I tried in Xubuntu 14.04 with Wine 1.6.2. I cannot reproduce this either.
There have been numerous issues with Wine integration in “Unity” desktop reported since Ubuntu introduced it (in Ubuntu 10, I think). This seem to be yet another one.
In my understandng this is also more a cosmetical than a real problem. This http://forums.webyog.com/index.php?showtopic=7588 is a real problem however.