strange gradient behavior

[Mark Swindell]

I've got a stack I've been working on with a graphic rectangle with a  
gradient fill.  All has been well over the last couple of weeks until  
yesterday.  I opened the program and the gradient fill was missing.  I  
looked at the gradient properties frame and all was well.  No reviving  
it by changing settings, reopening stack, rebooting Rev, restarting  
computer.  I created a new graphic rectangle and set its gradient  
properties.  Voila, it's gradient came alive, as did the original  
rectangles.  But it redraws funky, lines appear, and it shimmers when  
resized.  Not like before.  I repeated this scenario a couple of times  
with the same result.

Finally, I created a new rectangle, deleted the old one and all seems  
well again.

My questions are:

Has anyone seen anything similar?
Can individual objects become corrupted?

Mark