This is the log:
<?xml version="1.0" encoding="UTF-8"?>
<
<C:calendar-home-set xmlns:C="urn:ietf
arams:xml:ns:caldav"/>
</D
rop>
</D
ropfind>
2008-12-19 15:22:55,631 DEBUG [btpool0-6] [ds=Yahoo;] dav - WebDAV request (depth=zero): /principals/users/grantcolin
2008-12-19 15:22:56,585 DEBUG [btpool0-6] [ds=Yahoo;] dav - WebDAV response:
<HTML>
<HEAD>
<TITLE>Could Not Connect</TITLE>
</HEAD>
<BODY BGCOLOR="white" FGCOLOR="black">
<H1>Could Not Connect</H1>
<HR>
<FONT FACE="Helvetica,Arial"><B>
Description: Could not connect to the server "<EM>caldav.calendar.yahoo.com</EM>".