What do you mean by "partially blocking Yahoo Toolbar?"

Can you give me a screenshot so I know what you're seeing? Please see How do I create a screenshot of my problem? to create a screenshot
Once you've done this, attach the saved screenshot file to your forum post by clicking the Browse... button below the Post your reply box. This will help us to visualize the problem.

Here's a screenshot. However, the condition no longer exists as of this morning. Perhaps a side effect of the upgrade. "If it ain't broke, don't fix it."