On Sunday 30 October 2011 16:46:07 Lisi Reisz wrote:
> So, alternatively, is there some way I could tidy up the "corrupted" copy?

if you still have the folder containing your emails (mine is 
~/.trinity/share/apps/kmail/dimap, might be somewhere else for you),
it should be ok to delete the (corrupted) index files:

cd <your email folder>
rm -rf *.index

kmail should be able to recreate the indices from there.
note: this applies if your mails are in a maildir-format structure,
mbox will need other procedure (not sure, which).

HTH
werner