Brushes acting goofy

[doug...@adobeforums.com]

We've just installed CS4 in our classroom here and there seems to be a glitch with the brushes. On Our Mac's they are behaving fine, but on our 64bit XP machines the brushes seem to have a problem. When we resize a brush (brush,clone stamp,healing)at a certain size, parts of the brush disappear, as if its in a box and only a part of the cursor edge is visible. As we increase the brush size, less and less becomes visible so there may only be a few degrees of arc showing. Strangely, the size at which the affect takes place is consistent with screen size NOT with the image size. Any Ideas?

[Chri...@adobeforums.com]

Update your NVidia video card drivers - it's a known bug in older drivers.

[doug...@adobeforums.com]

Thanks. That did it.