Where's my "expand" icons?

[DaveP]

I've suddenly lost the little + icons in my tree views. You know, the thing you click on to expand the branch & see the items below it?
Except for that, my tree view in the Project Browser looks and works like it usually does. Ditto for the Visibility dialog box.

But all I see are the lines, not the expand icon. If I click on where the icon should be, it will expand as normal, I can't tell what's got something under it, & what doesn't.
I've attached a screen shot so you can see what I'm talking about.

Anybody have any ideas?
I'll reboot in the mean time.

[DaveP]

Never mind....
I didn't even need to reboot.
Just quitting and Restarting Revit did it.
Sorry to waste your bandwidth.

[sbrown]

I don't know why this happens, I get it periodically too. I think its just a graphics thing, you can still click where the + should be and the tree expands.

[funkman]

something strange in the water....I had this last night, restarted, and all 'twas fixed