There is a known bug with agent speaking long lines that has been fixed for the next version, however I'm not sure if this is the same issue that's affecting you. I performed the above tests on both Vista and XP and was unable to cause mIRC or Agent to hang. Does this issue occur if you quickly type in one short line after another? Or only if you type in one long line?
It's possible it could be an audio driver issue. If you disable your audio device completely (in the Vista Control Panel/Hardware and Sound/Manage Audio devices section), is the issue still apparent?
After disabling the driver, and rebooting, it seems that I'm unable to reproduce any of the freezing. I'll look into passing this informtion along to Realtek.
Thanks for looking into it.
