Have you tried downloading the Toad 14.0 beta and seeing if the problem exists in there? We added an option to use enhanced toolbar tool tips in Toad 14.0 that should be available in the beta.
If you haven't tried it yet, feel free to download the beta and give it a shot. You can download the beta here:
When you run Toad 14.0 Beta, you can find the option by opening up the Options window and selecting Toolbars/Menus -> Toolbars -> Use enhanced hints / tooltips.