There is a way to turn off some tooltips:

Control-click one of the column headers, and there should be an "extended tooltips" option. Just uncheck it.

If it's already unchecked, then it's just the regular tootips that show, and there's no option to turn those off yet.

btw--it usually just means an extra click to get at the files underneath, and after a while, I just get used to the extra click and I don't even notice the iminor irritation any more.