Hi Catwoman, I had my gall bladder removed in Feb 08.
I should imagine, as high fat foods can cause a gall bladder attack, the low fat diet before removal, then going back to a normal diet afterwards could be a reason why??
Personally it didn't effect my weight at all.
Just a tip for after surgery, I had really bad pains in my shoulder blade for a few days after, apparently it's common, I found those wheat bags you can heat in the microwave very helpful.
I was in and out the same day, given tramadol for pain, but, never touched them. Had it done on a Wednesday and Saturday I was doing laundry and visiting my mum.
Best of luck, any idea when surgery will be?