I don't know if this counts as a bug or not, but I'm sure it's not 'intended' so I'll post it here.
This does not seem to be specific to any one capx, so there's no point in posting one. I have upgraded to version 152 (64 bit), though I may have had this problem before. I honestly can't say.
It happens all the time now. Basically, any "menu" will be invisible until I mouse over each option in the menu.
These include things like right clicking on a sprite (insert new object, edit animations, clone object type, etc.), the drop down arrow at the top of the screen (customize quick access toolbar, etc.), and things like right clicking on an animation (add animation, add subfolder, etc).
Now, this is not a crippling glitch. It does not affect performance. It is a bit annoying though, and slows me down a bit.
Sometimes, like I said, it will work fine, but I'd say that 90% of the time, I end up with an invisible menu that I need to mouse over before I can see what's there, and they show up one at a time.
I don't know what's causing it. This is the only program on my computer that does this.
It's a fairly new computer, Win 7. Let me know if you need anything else.