Safari Screen Draw Glitch? - History Coverflow Appears within Web Pages

I'm not getting the CoverFlow interface partially appearing in windows like you are, but on two of my Macs, I've noticed hundreds of +error: unknown error code: invalid drawable+ messages in the console from Safari.

I think it's definitely a problem with CoverFlow, as when I launch Safari without going near the History or TopSites screens, I don't get these messages. As soon as I invoke the History window (CoverFlow view), once I return to browsing, the messages start. It's something to do with Safari capturing and caching screen images.

The way I've avoided this until it's fixed is to change my default homepage to anything other than TopSites, and to use the History menu rather than the CoverFlow view.

I've certainly had a few little glitches in Safari 5.x generally.

I have the same ensue of Jason Golden, some times I need restart my Safari to solve the problem temporarily.
One time a week I restart all my Mac to avoid system slowdown.

Some times this make me think in make a test drive with Windows 7 to see if it have problems of this kind.

*bump

Same problem. Coverflow is not redrawing to show anything but the last page visited. I went to the Apple Store yesterday to report this problem as well as as wake from sleep issue. Kind of fixed the Safari coverflow problem and now today the same thing is happening. So the problem has not been fixed.

I think this is more of a graphics card and memory issue than a Safari issue. If Apple doesn't get this fixed soon I will be demanding a new Macbook Pro.