Several days ago I upgraded to kde 4.6.4. This "upgrade" included the new kmail and the problems started soon after. First off my messages were not imported forcing me to do it manually. The process took several hours resulting in a slow, sluggish, and unusable kmail. Add to this the 18 akonadi related entries in the running processes. I find the new kontact suite too invasive, resource wasting, and unstable. It's not like kmail is overloaded. I have around 6k messages in various categories and six email accounts. After using kmail for several years I now find myself forced to seek an alternative. I liked the features in kmail like easy implementation of filters and antivirus but since problems like this are apparently a low priority it looks like I'll be switching to thunderbird and will figure out how to remove akonadi, nepomuk, kde pim, and the kontact suite without making kde unusable.