As I said I was mining at Slush's pool until I notice problems after he introduce merged mining. At first only those that wish to do so was adding their hash rate to merged but then he announced that everyones hash rate would be contributing to merged mining and at this point I began to have issues when connected to mine at his site. I would have sudden system failures (bsod), internet connection problems that only happened when mining, and other minor problems that all vanished when I moved. So through my observations I would say it was due to the merged mining. As to the claim that Slush's pool lost people to goig merged well I was one so there is my proof and where there is one as the say goes, there are always others.
You do understand that your miner has no idea it is even merged mining.
non-merged mining:The pool sends you a block header. You add in the nonce and hash it. It is just numbers. The pool gives you some numbers and you hash them. When you find shares or solutions you tell the server. The server keeps sending you new numbers to hash.
Merged mining:The pool sends you a block header. You add in the nonce and hash it. It is just numbers. The pool gives you some numbers and you hash them. When you find shares or solutions you tell the server. The server keeps sending you new numbers to hash.
Looking at the block header it is impossible for you or the miner to even tell if it is a merged block or not.
I did find 3 shares though in the first 15 min. mining. 
! Next in Windows 8 : interactive colored BSOD screens ! 
