Others have reported this as well, although we have not been able to diagnose the problem more precisely.

We will (for real this time) be releasing LimeWire 1.5 quite shortly, and it will include a new Java Runtime Environment that should handle keyboard interactions with the operating system more cleanly. Are you running LimeWire on Windows?

I would recommend installing that version when it is released, and uninstalling the others. The new version will also include several important new features, such as the ability to reduce LimeWire to the system tray and improved resume functionality. I would keep the LimeWire 1.3 installer around just in case, though.