windows only, 29 crashes on b4 and newer in the last week: http://is.gd/XZpn
All since June 3rd, even. Maybe bug 494370 - Better query for mDBGetItemProperties or bug 494371 - Get itemType only once per itemAdded notification
a previous instance of a similar crash has been addressed in bug 493538. in such a case it was due to GetDBInvalidFrecencies, that was not taking in count column number differences between real tables and temp tables.
The line seems to be: nsresult rv = aStatement->BindInt32Parameter(0, aCount); So yeah this sounds familiar where aStatement (GetDBInvalidFrecencies()) is returning null because it fails to create the statement.
Actually looking at link in comment 1, i don't see any crash after 19 May build. so this is probably simply a dupe since that crash has been fixed from 20 May build.
FWIW, this happened on a branch-nightly build from 05/15 (built from changeset a6445e2e8691) so Marco's probably right.
Yeah, this has been fixed. Sorry for the bad report, folks!