Windows Vista Ultimate (6.0.6000)
Windows Live Messenger 8.5.0601
Messenger Plus! Live 4.23.0.276
Can't confirm
Turned off "Automatically play sounds"
When someone sends me a custom sound and I click play, I lose focus on the chat box (which is what is supposed to happen). I just click it again and I can type
What they are saying is they have to click a second time for some odd reason.