Just in case...
Here are the error messages I was getting when the issue first began about a week ago:
Error: this.docShell is null
Source File: chrome://global/content/bindings/browser.xml
Line: 0
Error: uncaught exception: [Exception... "Component returned failure code: 0x80540006 [nsIApplicationIcon.show]" nsresult: "0x80540006 (<unknown>)" location: "
JS frame :: chrome://webrunner/content/webrunner.
js :: anonymous :: line 687" data: no]
Error: formatURLPref: Couldn't get pref: extensions.getMorePluginsURL
Source File: file:///E:/Documents%20and%20Settings/Owner/Local%20Settings/Application%20Data/Zimbra/zdesktop/win32/prism/xulrunner/components/nsURLFormatter.
js
Line: 68
I have 3 addons:
Inquisitor
Prism Runtime
Zimbra DnD
I am on XP SP3, all updates current.