Hello All ...
We have had a few Strange issues lately when dealing with Masks in
Adobe After Effects CS5 (Version 10.0.0.458).
The first anomaly was when we selected a layer with Masks, the Masks would
not become visible unless we used the pen tool or one of its variants and
clicked in the general area, then the mask/s would appear.

The next issue a few days later was when a Mask is selected, for some reason
the arrow key controls became inverted.  Down became Left, Left became Up,
etc. The next day when Masks were drawn, the edge of the Mask did not form
along the edge of the Bezier line, almost as if Mask Expansion was on
(in a negative value in this case).

Is there anything from the BGB (Big Giant Brain) collective that may shine
some light upon this?
Thanks
Jim