After the Upgrade to KDE 4.8, the filters don't seem to work anymore.
Neither incoming Mails are filtered, nor does manual filtering do anything.

I created the filters by right-clicking on a mail, select "Create Filter" and then choose one of the available options.

In the appearing window I then define the action that should be done, which in my case is moving it to another folder, on another mailserver. I know this is a very unusual thing to do, but it worked flawlessly with KMail 4.7, actually that's the reason I chose KMail.

Maybe it's a regression, but more likely I did something wrong, so I thought I might just ask for help here. Attached are two pictures showing one of the filters, the german locale is used, but you might still get the idea.
http://cloud.revreso.de/apps/files_sharing/get.php?token=f80be5c0c305460983955679064ef2164e13ba4b
http://cloud.revreso.de/apps/files_sharing/get.php?token=16c236b6b5507a90d0ae3797cd4f8593bdb9c193

I had that problem, restarting the computer solved it.. but yes, something is wrong with the filters

Some work in the filters went in at the PIM sprint but I fear things are too invasive to be backported.