Just done as you suggested capnm,
(Set the maximum number of sort 'levels'")
(Specify columns to sort the booklist by on startup)
Close tag browser before exiting etc
It didn't make any change to my 2min startup time.
Its weird to have a program take such a long time to start up from a rebooted system, even photoshop only takes 14seconds on my system.
I guess I'll have to remove all my custom columns - but that'll pretty much break the way I use calibre.
If I don't have my genre column and my audio book column, then I'm not going to be able to use the program to easily find the books I want to read etc..
Maybe there's some other bug or setting specific to our libriarys that is causing this issue.
Anyway for now I'll either just stare at the blank white Calibre window, or go make a cup of tea on restarts
