Thanks to Christian we have a bunch of clean-ups in the way KMail's addressee and recipient editors work. This new code will probably be fast-tracked into the 3.5 branch, but for now we have it only in the features branch for testing. So, please do test.
Feedback to email@example.com please. Not all of our new contributors are reading my blog.
In particular, this patch addresses the following bug reports (at least):