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You could repair your phone with PCC
Bridge (for Mac)
Alternatives on How to backup Xperias
http://talk.sonymobile.com/thread/36355
If its a software issue, that could solve it.
Have you tried running your phone in Safe Mode or tried using the Sony Home Launcher to see if the problem still occurs 
http://talk.sonymobile.com/t5/FAQ/How-to-boot-your-phone-into-safe-mode/m-p/348008
@KR23 wrote:
Safe mode did stop it from occurring, but is there anyway to determine which app was causing the glitch?
Come out of Safe Mode......look to see what 3rd Party Apps you have recently installed, go to Settings - Apps & swipe across to All then its a matter of scrolling down to each 3rd Party App you have installed & click on it, then Force Stop.
Then go back & see if this has cured the problem.........if not then restart that App & move on to the next......bit of a fiddling process i'm afraid :smileysmileywink:
Try & think of the last one you installed & work backwards from that.....
Glad i could help 