I just upgraded to BN747-51 and I now find that the code disassembly window displays null bytes instead of the correct instructions.
When I use the window scroll bar to move through the code the correct disassembly is displayed, not changes to null as soon as the scroll bar is released.

Also the step into / step over seem to be behaving strangely. Some times the step over will work and other times it performes lile a "go" command

This is on a Cypress EZ-USB-FX2 using STD UART 0 for the rom monitor.
(This was all working correctly before upgrading to BN747-51)