User-Agent: Opera/9.50 (X11; Linux i686; U; en) Build Identifier: Although this is reported several times in bugzilla none of the stacktraces available are similar to mine. I have current cvs HEAD debug build of 'suite'. It has appeared for me in mailer. I have opened and email which was a forward of two attached messages (.eml). I double-clicked one of the attached messages and while closing that window I got the assertion. Stacktrace will follow. Reproducible: Always Steps to Reproduce: 1. 2. 3.

Top-most half overlaps with the previous stacktrace.

Strange, I thought I'd already filed this, but I can't find it again, so I'll move this bug into the correct product.

I'll get someone to look for a regression range for this.

+'ing this pending investigation.

same as bug 424281 ? (will add a stack to Bug 424281 also)

this regressed due to bug 352791

Affects Thunderbird shutdown as well, see Thunderbird's startup/shutdown noise tracker bug 426946.

Taking this off the list. Doesn't seem to actually break anything at this point. Also, if found to be more serious, we can take in a dot release.

David, as per bug 415495 is it now a requirement for controllers to be removed manually? (Prior to bug 352791 it wasn't necessary.)

I didn't know that it was ever unnecessary in the past. It would be nice if it were not needed, though.

Looks similar to bug 324025.

So don't remove controllers explicitly? I have a patch to reduce this assertion, it it needless?

Bug 747434 removed the assertion.