http://bugs.winehq.org/show_bug.cgi?id=28060
--- Comment #1 from David turbolad995@hotmail.co.uk 2011-08-12 05:28:39 CDT --- On closer inspection, the tiny part of the white opaque square that's cut-out shows the "+" and then changes into the correct "square" when moved over one or more lemmings.
The game also "pauses" briefly, in Wine, when the lemmings are entering the home on every level. As that's a very minor problem, I'm wondering if creating another bug report for that would be a waste of time?
Both of these problems have appeared in the past month with updates to Wine.