I remember this bug from the beta days and it was fixed then, but I'm getting it again. I noticed it when I switched Logos4 from my secondary monitor to my primary, so I don't know how long this has been going on.
I'm currently using L4 SR-7 on this machine. Win7 has all it's updates.
Here are my full system specs:
Dell Studio XPS 435MT; Win7 64bit Home Premium; 6GB DDR3 RAM; 465GB free HD space on C:\; CPU: Intel i7-920 2.67GHz (8MB L3 cache); Video ATI Radeon HD 4850 (512MB).