Run the spreadsheet demo applet.
Select cell B2
Partially cover the applet with another window so that half of cell B2
is covered, and half is not.
Click on the titlebar of the SpreadSheet applet to bring it to the front.

Note that on build 75 of merlin beta2, half of cell B2 is painted with
the highlight color, and half is not.

This doesn't happen in jdk 1.3.1.

Reproduced on sparc and winNT.