Unless my subconcious was trying to tell me something! It's quite embarresing actually when clients come to look at a mockup and are shown a big pink screen!
It's the normally grey area around the image. When you pull the corner of the image to expand its containing area - you normally have a grey background. Mine is pink. And I DONT KNOW WHY!!!!!!
Ok, yeah, that is pretty damn weird if you ask me. I thought for a moment that it was your grid, I didn't take the time to notice the actual image so I figured it had to be that. No clue what's going on there but I couldn't find any setting on my end that would do that to the grid and it's outside border ._o
damn marti, I was totally unaware of that option. I'll have to remember that for future reference if I'm ever dealing with edges sharing the same color as stuff inside my canvas.