Mac OS X 10.7.3 macmini4,1
Run the attached sample (the same as in 7124289). First, a robot would click trying to cover a blue modal dialog. After a fix to 7124289, it will fail to do it, OK.

Now, after robot finished, click once somewhere in the frame F2: this frame _will_ overlap the modal dialog.
It is a one-time issue. Clicking anywhere after that, you'll fail to hide parts of the modal dialog: it will come up and stay up.