Create a GUI application in QT 5.3, when run it will be normal, but when I pass the mouse on top of her she is completely white. Desistalei qt 5.3 and installed 5.7 qt and the problem persisted. This only occurs on my computer. Anyone know how I can fix this?

It is exactly like this link, only in my case I am compiling directly in Qt interface (Rebuild and Ctrl + R)

This did not happen when I ran the first few times ... Only after much of the project is implement.

Sorry about my English.