Doing a clean trunk build from CVS gives me the following error message on startup: XML Parsing Error: error in processing external entity reference Location: chrome://calendar/content/calendar.xul Line Number 68, Column 69: <!ENTITY % brand.DTD This worked on the last weekend so the regression window is somewhere between last Sunday and today. Culprits could be the the checkins for bug 288045 or bug 274928 (I would bet my money on the last bug), but that is just an educated guess.
Ok, after backing out the Sunbird-specific changes of bug 274928, Sunbird works again as it should be.
CC'ing dbaron on this bug, since his change introduced this regression.
Created attachment 180292 [details] [diff] [review] patch sorry, my calendar tree was (due to misordering within mozconfig files) way out of date when I made the original round of changes, so I missed this. Checked in now.