Lotus 8 Client Error

After upgrading from Notes 7 to Notes 8 the user gets the following error upon double clicking an email:

CLFNM0138E: This exception occurred during runtime while executing code on these selections: {0}, while catching a double click event

We have re-installed the client and done fixup/updall/compact on the users mail database and still get the error.

Any help or suggestions would be greatly appreciated.