I've written a hefty LOB application, which runs perfectly on XP SP2, Vista SP1 and Server 2003, and has been tested on 6 different machines so far.
My client has an HP laptop running Vista SP1 with .NET Framework 3.5 SP1, yet for some reason when the application is run on his laptop, on some screens simply moving the mouse pointer causes dozens of exceptions to be thrown, resulting in dozens of message boxes being displayed.
I know that this is one of those way-out-there questions, but I'm hoping to touch base with anyone who's seen similar behavior or can point me towards how to diagnose and solve this problem.
In a nutshell, the client's PC is the same version of Vista and .NET framework as my development machine, and I'm not using any 3rd party components or assemblies. Any clues?