I have a program that creates a dummy file and then proposes to open it using user's default file editor via a Java SDK call. The file can be opened either by clicking a button or selecting a menu item.

When using the button, file is opened
When using the menu item, file is opened, but application crashs.

I posted the whole code and crash stack on this page:
http://stackoverflow.com/questions/25075883/why-the-same-code-works-from-qpushbuttonclicked-and-crashs-from-qactiontri

I'd appreciate not having to copy all here, but if needed, I can do it.