Game freezes because GFXdevice is in invalid state?

As title states I get these short freezes mostly lasting 5-10 seconds. I decided to test it by waiting till the freeze occurred to check the console after it happened I was able to get this

not entirely sure what it means by GfxDevice is in invalid state and was wondering if anybody knew what was going on with my Game ^^

[editline]14th December 2013[/editline]

anybody :C?