Patchou, are you sure that the memory leaks are gone?
Cause I'm still noticing slowness even on my new computer while Messenger is running, maybe it's not Plus! afterall..
Windows Version: Windows ME, 4.90.3000
Messenger Client Version: 7.0.0425
Messenger Plus! Version: 3.40.0110
2.6GHz Processor
640MB of RAM