from last few builds specific to windows 64bit. viewport back ground image loading crashes blender.
steps to reproduce...
just click viewport backgorund, add image
click on load image, and as soon as u pick image by double clicking or hitting enter key, it never came back, simply halts and then i have to close process of blender.
for sure, b.28237 was ok, and i can do same, after that all 64bit builds from graphicall have same problem.

more detail:
quiet interestingly, if i load image in a build which is working fine. and while loading, i clicked "relative" )and save file and then open file in new build, two possibilites here
1- either it shows file in background just after loading and hang in next second
2- or it doesn't show file in viewport, but it shows in right sidebar(n key) where i load it. as soon as i click this, it crashes again.

just confirming that i m getting same behaviour in home and office
also i have tried changing image formats from jpg to png or tga etc..