Having upgraded to V9 in our demo lab with a Fujitsu LT20/TX08 8-slot tape-lib we occasionally get a GUI error while browsing to the media pool in the tape-infrastructure tab.
"....Stack Server Limit has been reached. Please look for potentially deep nesting..."
In ~80% of the times it works and shows the tapes as expected.
In V8 this error was never seen. Installation was working flawlessly. Nothing changed, except upgrade to V9.