I noticed the change from the three to the two prong adapters. However, this does not necesarily fix the issue. I have talked about this for months and here is a recent post on another forum:
http://www.shacknews.com/ja.zz?id=13577828
My Wife's 9300 does the same thing. My eMachines A64 notebook does the same thing.
From what I can tell, a lot of notebook manufactures are using some kind of non-conductive coating/paint on their laptops. When this paint becomes chipped or exposed by a screw that isn't covered in the same material, current can flow.
So still beware that even with a three prong adapter, you may be exposed to some shocking, and not the good Wichita State kind.