has anyone here experienced this video problem?...

I've been meaning to ask you guys why the fallowing display problem happens, or if anyone of you guys have experienced it. Every once in a while when I'm working on a part or assembly (made of many parts or not many at all) I see the part(s) displayed in shaded mode as expected, but then out of no where after, I perform an operation, such as edit a part in-place then go back to the assembly or I move a component, the assembly gets sliced as if by an imaginary invisible plane. When I rotate the assembly the slicing invisible plane stays put so the assembly updates as I rotate it, to show it sliced in that orientation. The only way that I've been able to fix this problem is by re-starting solidworks 2003. Is it possible that this issue is yet more proof that my fire gl2 is garbage? I've used the latest drivers and older drivers. It doesn't matter what version of drivers I use, the problem still occurs. The other view related issue that's even less of a problem to me, but still weird to me is when I'm in a fab drawing and I place a flag note near a balloon (in AutoCAD I had no need to eye-ball this step, because I could osnap the end of the vertex point on the flag to the quadrant of the balloon), but because geometric relations are what's used in saw it would be more of a pain, so I just eye-ball it, by zooming in. When I zoom out, though, the flag note looks like I didn't do a very good job eye-balling near the balloon, so then I zoom back in to fix this problem, but when I zoom in I see that there's nothing to fix, because the flag is placed just where I want it. Only when I zoom out does it look like it's not touching the balloon. Like I said before these issues aren't a big deal, but I am curious as to why they happen. Any help figuring this stuff out would be appreciated.