Black / coloured boxes following my cursor around in SL!

Suddenly in SL (latest version) my cursor arrow has little black/coloured boxes underneath it as I move it around. It's like a block directly under the arrow with a smaller turquoise box next to it - the boxes kind of flicker as I move the cursor around the screen.

Cursor is fine everywhere else - only have this issue in SL.

I'm using a Mac G5 (PPC) with OSX 10.4.11

Can anyone help?

I have tried restarting / emptying cache etc.

Thanks

This happened to me today, and I'd never seen it before. Considering the fix I found, it's kind of weird that there was also a forum post about it happening on Windows, but whatever.

Today there was a little power outage, and I decided to fire up SL a while after it came back. The mouse was dragging unusually slowly and the weird cursor outline was there in SL. After poking through preferences for a while and coming up empty, I noticed that all the on-screen text looked slightly blurry, like it was on an old CRT.

It turns out that somehow, when the system started up, the screen ended up slightly zoomed (the type of zooming you get when sliding a mouse wheel while holding down the control key). I stopped SL, Ctrl-scrolled the resolution back down to normal (it was just one notch off), and SL was fine after that.

More oddly, I can't seem to reproduce the problem at will. Normally, Ctrl-scroll zooming seems to get reset to normal when I start up SL, so I don't know how the screen got into that state in the first place (maybe something to do with the power cut?).

Zombie thread rises!

This happened to me today-- used a long plane ride to run down my MacBook, opened up SL later, terrible flicker! I thought my video card was on the way out. This fixed it in two seconds, and my computer is fine. Thank you, Viktoria!