First off, I apologize in advance for not being able to provide too many concrete details. This seems to be a wierd one. I'm TRYING to use kmail (version 3.0.1-1 built from rawhide sources), and it had been working great, until I upgraded to kernel-2.4.18-5. Also, fyi, my home directory is NFS mounted from a Redhat 6.2 server (kernel-2.2.19-6.2.16). Anyway, after the kernel upgrade to 2.4.18-5 on the nfs client, most imap (imap server is the same rh62 box reference above) operations involving moving/deleting messages to/from folders fail mysteriously. A typical example: I delete a message from my inbox (and it disappears (initially), as it should)... I then switch to a different imap folder. When I come back to inbox, the deleted message reappears. I downgrade back to kernel-2.4.18-4, and this problem goes away.
I suspect that this has something to do with it (from kernel-2.4.18-5's changelog): * Mon May 13 2002 Michael K. Johnson <johnsonm> - add the dnotify notification cancelling patch since the version of kde packages I'm using has fam support.
The dnotify patch was a strict bugfix (use-after-free of the internal data)
FYI, haven't seen the problem in a *long* while... some combination of my using kde-3.0.2 and/or kernel-2.4.18-7 (see #67199 and #67461) probably fixed it.
With recent kernels, haven't seen the problem. Closing...