Hi,
Before the update, everything was working fine.
After the update, I got reports about the delegation of accounts (sendAs feature) not working anymore.

Here are the details:
When a user tries to send an email as another user, he gets an error message in his Browser:

Code:
Berechtigung verweigert.
method:	[unknown]
msg:	permission denied: you do not have sufficient permissions
code:	service.PERM_DENIED
detail:	soap:Sender
trace:	qtp1446826388-33639:https://192.168.0.107:443/service/soap/SendMsgRequest:1397478020690:85f25dda5f867f9c
request:	

Body: {
  SendMsgRequest: {
    _jsns: "urn:zimbraMail",
    m: {
      did: "eb0452ce-2b55-474e-9105-28bc55a29f20:1440",
      e: [
        // [0]:
        {
          a: "info@xxxx.com",
          p: "Michael Schreiber",
          t: "t"
         },
        // [1]:
        {
          a: "auftrag@intern.lokal",
          t: "f"
         }
       ],
      id: "eb00f7ce-2b56-660e-2205-28bccca29f20:1560",
      irt: {
        _content: "<1058887657.12669.1397478017407.JavaMail.zimbra@xxxx.de>"
       },
      mp: [
        // [0]:
        {
          ct: "multipart/alternative",
          mp: [
            // [0]:
            {
              content: {
                _content: "striped"
               },
              ct: "text/plain"
             },
            // [1]:
            {
              ct: "multipart/related",
              mp: [
                // [0]:
                {
                  content: {
                    _content: "striped :)"
                   },
                  ct: "text/html"
                 },
                // [1]:
                {
                  attach: {
                    doc: [
                      // [0]:
                      {
                        optional: 1,
                        path: "Briefcase/logo.png"
                       }
                     ]
                   },
                  ci: "ea891cbce9d823addd735a33a018124182293275@zimbra"
                 }
               ]
             }
           ]
         }
       ],
      su: {
        _content: "asdf"
       }
     },
    suid: 123412341234
   }
 },
Header: {
  context: {
    _jsns: "urn:zimbra",
    account: {
      _content: "auftrag@intern.lokal",
      by: "name"
     },
    authToken: "(removed)",
    notify: {
      seq: 2
     },
    session: {
      _content: xxxxxx,
      id: xxxxxx
     },
    userAgent: {
      name: "ZimbraWebClient - FF28 (Linux)",
      version: "8.0.7_GA_6021"
     }
   }
 }
This is pretty annoying.
in the message log, the following exception is shown:
Code:
at com.zimbra.common.service.ServiceException.PERM_DENIED(ServiceException.java:288)
        at com.zimbra.cs.mailbox.Mailbox.checkAccess(Mailbox.java:2308)
        at com.zimbra.cs.mailbox.Mailbox.getItemByPath(Mailbox.java:2974)
        at com.zimbra.cs.mailbox.Mailbox.getItemByPath(Mailbox.java:2924)
        at com.zimbra.cs.service.mail.ParseMimeMessage.attachDocument(ParseMimeMessage.java:757)
        at com.zimbra.cs.service.mail.ParseMimeMessage.handleAttachments(ParseMimeMessage.java:485)
        at com.zimbra.cs.service.mail.ParseMimeMessage.setContent(ParseMimeMessage.java:521)
        at com.zimbra.cs.service.mail.ParseMimeMessage.setMultipartContent(ParseMimeMessage.java:591)
        at com.zimbra.cs.service.mail.ParseMimeMessage.setContent(ParseMimeMessage.java:515)
        at com.zimbra.cs.service.mail.ParseMimeMessage.setMultipartContent(ParseMimeMessage.java:591)
        at com.zimbra.cs.service.mail.ParseMimeMessage.setContent(ParseMimeMessage.java:515)
        at com.zimbra.cs.service.mail.ParseMimeMessage.parseMimeMsgSoap(ParseMimeMessage.java:365)
        at com.zimbra.cs.service.mail.ParseMimeMessage.parseMimeMsgSoap(ParseMimeMessage.java:204)
        at com.zimbra.cs.service.mail.SendMsg.handle(SendMsg.java:163)
        at com.zimbra.soap.SoapEngine.dispatchRequest(SoapEngine.java:522)
        at com.zimbra.soap.SoapEngine.dispatch(SoapEngine.java:385)
        at com.zimbra.soap.SoapEngine.dispatch(SoapEngine.java:258)
        at com.zimbra.soap.SoapServlet.doWork(SoapServlet.java:294)
        at com.zimbra.soap.SoapServlet.doPost(SoapServlet.java:210)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
        at com.zimbra.cs.servlet.ZimbraServlet.service(ZimbraServlet.java:207)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
        at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:654)
        at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1320)
        at com.zimbra.cs.servlet.CsrfFilter.doFilter(CsrfFilter.java:78)
        at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1291)
        at com.zimbra.cs.servlet.RequestStringFilter.doFilter(RequestStringFilter.java:52)
        at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1291)
        at com.zimbra.cs.servlet.SetHeaderFilter.doFilter(SetHeaderFilter.java:57)
        at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1291)
        at org.eclipse.jetty.servlets.UserAgentFilter.doFilter(UserAgentFilter.java:82)
        at org.eclipse.jetty.servlets.GzipFilter.doFilter(GzipFilter.java:256)
        at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1291)
        at com.zimbra.cs.servlet.ETagHeaderFilter.doFilter(ETagHeaderFilter.java:45)
        at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1291)
        at com.zimbra.cs.servlet.ZimbraQoSFilter.doFilter(ZimbraQoSFilter.java:114)
        at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1291)
        at org.eclipse.jetty.servlets.DoSFilter.doFilterChain(DoSFilter.java:474)
        at org.eclipse.jetty.servlets.DoSFilter.doFilter(DoSFilter.java:345)
        at org.eclipse.jetty.servlets.DoSFilter.doFilter(DoSFilter.java:316)
        at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1291)
        at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:443)
        at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:137)
        at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:556)
        at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:227)
        at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1044)
        at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:372)
        at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:189)
        at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:978)
        at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:135)
        at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:255)
        at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:154)
        at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:116)
        at org.eclipse.jetty.rewrite.handler.RewriteHandler.handle(RewriteHandler.java:317)
        at org.eclipse.jetty.server.handler.DebugHandler.handle(DebugHandler.java:81)
        at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:116)
        at org.eclipse.jetty.server.Server.handle(Server.java:369)
        at org.eclipse.jetty.server.AbstractHttpConnection.handleRequest(AbstractHttpConnection.java:486)
        at org.eclipse.jetty.server.AbstractHttpConnection.content(AbstractHttpConnection.java:944)
        at org.eclipse.jetty.server.AbstractHttpConnection$RequestHandler.content(AbstractHttpConnection.java:1005)
        at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:865)
        at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:240)
        at org.eclipse.jetty.server.AsyncHttpConnection.handle(AsyncHttpConnection.java:82)
        at org.eclipse.jetty.io.nio.SslConnection.handle(SslConnection.java:196)
        at org.eclipse.jetty.io.nio.SelectChannelEndPoint.handle(SelectChannelEndPoint.java:668)
        at org.eclipse.jetty.io.nio.SelectChannelEndPoint$1.run(SelectChannelEndPoint.java:52)
        at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:608)
        at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:543)
        at java.lang.Thread.run(Thread.java:744)
The installed version is:
zcs-8.0.7_GA_6021.UBUNTU12_64.20140408123908.tgz

Any ideas are appreciated!