This problem with Messenger started for me when I installed the Safari 3 beta. I have written numerous complaints to the Microsoft Mac BU and they seem to care less. Hence, moving to Adium is a good choice.
Personally, I just wish iChat would incorporate MSN Messenger service
Hi, I have(had) the same problem, and I didn't know the reason. Once I read "when I install the new Safari" it snap it, and I knew that from that moment my msn started to bug.
Anyway many thanks.
See ya