ABD U4 - Strange behaviour

Starting to find very odd behaviour in U4

First there was my previous post re BB_NAMING_STANDARDS_FILE which just resolved itself

Today I've had the situation when transferring between files using the all view groups visited dialog U4 decided to open the file in read only mode.

to correct this issue I'm having to transfer between files using open and with that method the file to be opens properly.

Have to simply ask why?

Ian