[Noughty]

I had this problem with version 0.8.18 and updating to 0.8.22 didn't solve the issue.

Calibre works smoothly without tag browser with it not so much. Basically if I edit metadata (not matter how minor) for more than one book, copy more than one book to another library Calibre always freezes up for a couple mins (time seems to be the same always). It happens if I edit even two books so it makes it impossible to edit metadata if tag browser is open.
It works perfectly even with cover browser opened as long as tag browser is closed. So to manage my library I have to always close tag browser which is a little annoying. And even so, after all edits if I show tag browser it freezes, so there is no avoiding it completely just diminishing the amount of freezing up.

What could be the cause of this or is this normal (I don't remember it always freezing up like that)? Could it be because of the number of columns I created or categories in tag browser I have? How many is too much for calibre? Does hiding columns/categories in tag browser make it easier for calibre (somehow I doubt it, since it still writes all metadata even if column is hidden)?

I have up to 40 columns total (with all default columns). All are never shown (msotly a few in different views) and in tags browser I have 16 (counting everything even searches) categories shown out off 28 possible (with all default created and mine).

I also have one column for making spreadsheat so it is very long as includes fields like title, author, formats and comments (summary).

I didn't increase my library so it can't be caused because of too many books.

Also, might be related, I seem to have all (or at least some) of my previously had columns in preferences>Look and feel>book details. They are deleted but they are listed here (as far as I know only there). Is it possible to delete them somehow? Could they cause problems?