Interface disappears on minimize (Win 7)

[GoogleCodeExporter]

What steps will reproduce the problem?
1. Run CookTimer
2. Minimize the window by clicking the [-] in the upper right-hand corner.
3. CookTimer window disappears (along with taskbar icon), however, process 
continues.  You cannot alt+tab back to it either.

What is the expected output? What do you see instead?
Expected output would be that the window is minimized.  Instead window is lost.

What version of the product are you using? On what operating system?
0.9.3

Please provide any additional information below.

Original issue reported on code.google.com by [email protected] on 22 Dec 2011 at 1:20