|re: "Does Excel have an normal.dot equivalent?|
Excel has 2 things that might be considered "equivalent" to normal.dot
Typically, a user would manually create this file, place their macros, etc. in it, set the worksheet to hidden and store it in the XLSTART folder.
Whenever Excel opens, it would open this file (hidden, of course) and all of the macros in it would be available for any open workbooks.
ExcelXX.xlb where XX is the version number of Excel that you are running.
This file is created by Excel and is typically stored in the user's Application Data/Microsoft/Excel folder. If the user makes any changes to a toolbar (e.g. adding a custom macro button) a .xlb file is created and Excel stores the "custom toolbar" in it for use whenever Excel is open.
I can't see either of these files causing the problem you've described unless someone physically did the work to create these files and make changes to some setting to force the "bitmap pasting" you are seeing.
I don't even know what setting you would change via a macro or toolbar to make that happen.