Yes, sorry. I'm using kde 3.5.2 (Kmail 1.9.1) with Kubuntu 5.10. I had also problems with previous version of Kmail when using Virtual Folders. The searches go fine (it detects all the mails that I was searching for) and I can create the search folder. The problem is after Kmail restarts, because it starts the searches again
and even in the same session.