Copying a word next to exclamation mark will highlight the exclamation mark as well. This often leads (for me) to buggy code when editing a C or Java code.
I quess this fuctionality is a result of some earlier 'enhancement' so I suggest that this highlighting could work differently depengin on TextPad document class. I my opinion the exclamation mark should not be highlighted at all.
So... this thread can now be removed from the Enhancement Suggestions list.
Final note - I think JDevelepoer caused the problem since it occasionally confuses certain special characters (in that case JDevelper must be restarted).