There are several of us here that have, what seems like, a bug with 2009.
We will open a drawing and one and sometimes two of the projected views are missing.
You can mouse over where you know they are, and red lines will appear, but no view will show.
We have found 2 work arounds, but not having the problem would be better.
One way is to open the assembly, rebuild the assembly, and close it. The views are now showing.
The other way is to RMB on the section cut line, choose edit sketch, and then close the sketch. Again, the view is not showing.
Has anyone else had this problem and do you know how to prevent it from happening in the first place?
Thanks so much for your help.

Our machine specs are:
SW 2009 SP 1
Dell Precision 380
Pentium 4
3.0 ghz
3 gb of ram
NVIDIA Quadro FX 1700