This thread will be updated with the list of known issues as they are discovered. The thread is locked so it doesn't turn into a general discussion thread.
These items are things that were discovered after the release of Prototype.6
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1) Setup-Voice: Output device selection is ignored.
FIXED: Download 2.3.2.Prototype.7 or higher.
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2) Setup-Voice: Test button does not work.
FIXED: Download 2.3.2.Prototype.14 or higher.
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3) Setup-Voice: Key clicks is not currently supported.
FIXED: Download 2.3.2.Prototype.9 or higher.
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4) Setup-Voice: If you enable "Use Push-To-Talk Hotkey" then you must do the following:
Edit: Starting with Prototype.11 if you click on the PTT check box in Setup-Voice it will instruct you on what to do.
Close the Ventrilo client
System Preferences
Universal Access
Check the "Enable access for assistive devices"
Restart the Ventrilo client
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5) Quit causes crash
FIXED: Download 2.3.2.Prototype.7 or higher.
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6) PTT gets stuck when Caps-lock is lit
FIXED: Download 2.3.2.Prototype.14 or higher.
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7) USB Headphone or Microphone device settings are lost when I add/remove USB devices
This problem is fixed in the next major upgrade. Had to change the way I track hardware identifiers. In the mean time you can prevent this from happening by not adding and removing USB devices to your computer.