I'm running into a new issue post-upgrade to 1.2. I am running XP SP2 (patched) on both machines as well as Multiplicity Pro 1.2 (same version). When switching to the alternate machine and then back, certain keys get locked (so far I've noticed trigger actions with "c", which brings up trillian and "p" which brings up Windows Media Player -- I don't know where the mappings are from either). If I hit the CTRL and ALT keys, these actions no longer occur. If the secondary machine is off or I don't switch to it, this does NOT occur, but it seems to be consistent when switching back to the primary. Again, this issue is consistent on the primary, but as a side note never occurs on the secondary.
Second issue I've had longer. If the secondary machine(s) goes offline, the primary machine goes nuts and takes forever (three minutes or more, normally) to recover keyboard control, then I have to kill multiplicity to get my mouse back. And then only sort of, it never refreshes screen position on the primary after it restarts unless it's hovering over an action item, such as a hyperlink, or marking text. Functional, but invisible.
If it's an issue, I run a Logitech G15 keyboard with the software installed as well as a Logitech G5 mouse.