Did as you suggested, removed both setFocus() calls that happen after Send is clicked

http://pastebin.com/j4adDpsM
Now it crashes in something else within qt.

I'm trying other things...

As I've said to you on IRC before, I think the problem is with this loop:

https://github.com/bitcoin/bitcoin/blob/master/src/qt/sendcoinsdialog.cpp#L261

This deletes widgets, but Qt may still be referring to them internally, and "Deleting a QObject while pending events are waiting to be delivered can cause a crash."

Can you try replacing with ->deleteLater()?

Wladimir