While using mIRC (v6.21) on Windows Vista (32bit), I sent a few messages to myself through DCC chat. The agent was set to speak all messages in DCC chat, and after speaking the first few lines, mIRC froze up. It stayed that way until I killed agentsvr.exe (or whatever it is called in Vista), and then mIRC unfroze and resumed operating normally.
I don't know if this is an mIRC bug, but I figured I'd report it just in case.
Thanks.
(Note: I do not have Windows Vista installed, at the moment, to test any further.)
