Arduino sketch deleted?

Something rather terrible happened today, I go to open up my arduino sketch, only to see the file reads zero kb and it's completely blank.

"Backup your files" I know...

My questions really are though, has anyone else ever had their arduino sketches mysteriously go blank, and if so, is there a temp folder where I can recover the data?

I'm running arduino 1.0.6 on windows 7

Never had that problem.
I am using the same as you.

Can you search your system for the file?
Is it in the recycle bin?

I use SyncBack.