I have been experiencing a problem with circular patterns: I make the feature, I pick and axis, and number of instances, it shows a priview, makes the pattern in the tree, but the pattern doesn't appear in the model itself. I though it might be a graphics issue, but the part(s) is simple, and I'm running a Xeon 2.66GHz, with 2 GB ram and 256 MB graphics. It dosen't seem to make a difference if the feature is a closed sketch or a thin feature.
Any clues?