Delete Key, IE, and IWP

I've run into a situation where a client can be working on a record via IWP using IE. If the client hits the delete button, they are given an IWP error and then when they reload, they are on a different record entirely.

This is a major security issue, obviously. However, because it is specific to IE (I've tested with other web browsers) and because there is nothing I can tweak in IWP, I'm not sure that it is a resolvable issue.

Before I approach the client and suggest that the solution get entirely rewritten in php, I was wondering if anyone has seen these or has any idea to keep it from happening?

Much thanks.