#40 Mouseover text makes "play area" unresponsive

[Fabian]

When I mouse over an entry of the list of presets on the left that is longer than the column (so that it shows a mouseover text with the full name), then the space in which the mouseover text was becomes the only area of the "play field" that shows updates until I resize the list. So the majority of the "play field" just stops changing at all, no matter how the content changes, I move it, zoom, whatever. This is a very specific bug, I wonder what's causing it.
Golly Portable 2.8 on Windows 7 Professional 64bit +SP1