Help (please)....

When trying to start the class browser or component gallery I keep getting an error and bombing out to VFP.

The error handler Displays:

"Invalid BuffDirty Call"

After clicking "OK", VFP displays a dialog box stating:

"C0000005 Fatal Error"
Called From "Clas Browser Init line 0 {}
Called From "Browser Line 0 {}

Rebooting, deleting the resource file doesn't help, the problem it far more predictable than any piece of code I've ever written (it occurs 100% of the time)

Any help would be appreciated