Double click to fullscreen doesnt work?

[Noldster]

I dont know if this was already addressed or anything, but when I double click on the video window, it goes to fullscreen then goes right back within a second. I tried reinstalling and it didnt help. I also checked my preferences/options and it looks all good to me..

edit: btw pressing "F" and right clicking>Video>Fullscreen both work fine. And also, when i double click when its already in fullscreen, it goes to regular then pops back to fullscreen (vice-versa :O)