Version: 1.9.5 (using KDE KDE 3.5.5)
Installed from: Debian testing/unstable Packages
When I click on a encrypted or signed email Kontact becomes unresponsible for several seconds When I lost my net connection it could hang there for two or three minutes.
The same is for feeding emails to Spamassasin. Up to several mails it's annoing but bareable. From 10 or more messages it gets only annoing.
It's mostly annoing because when I mark spam I could easily go to a next message, or switch to Akregator, for example. And I can't do it. When I read encrypted/signed mail it's bareable, but not for several minutes!
I have written "or Kmail" because I had the same behaviour with Kmail alone.
*** This bug has been marked as a duplicate of 41514 ***