I just noticed that the clock on my guest Windows XP system was running way too fast on my host Ubuntu Gutsy system. I had also noticed that double clicking seemed really difficult and there were a few anomalies with sound.

A bit of Googling turned up this tip from the VMware knowledge base. So to fix things I added these lines to the bottom of /etc/vmware/config.

host.cpukHz = 3060000
host.noTSC = TRUE
ptsc.noTSC = TRUE

Now the clock and lots of other things are better.