Garbled Menu on Tiger (iTunes + Safari)

Finally being able to get ahold of a screenshot of a problem I had a bunch of times while switching between iTunes and Safari windows (the URL is not to be held responsible :p )

Couldn't change anything, the past times, by simply trying to switch windows, the garbled Menu fixes itself; so, I was lucky to had an SSH session opened from Tango, due to my current Synergy setup, so I could run my screenshot script thru that PuTTY.

This seems to be happening only on my Quicksilver beauty, Thor, but ITOH, I don't use -at least for the moment- my PowerBook that much to be able to stumble upon the bug.