1) Start Qt Creator;
2) Open a simple text file;
3) Edit that text file using another editor than Qt Creator;
4) Try to close Qt Creator by using its system menu (and not the close button).

Expected result: Qt Creator closes (as happens when using the close button).
Actual result: Qt Creator freezes and the only way to close it is by killing its process.

(Sorry if this is not an issue with Qt Creator 2.5, it's just that I use the Qt SDK and well... I am still waiting for the Qt Creator update...)