In Opus 9, I check Auto-size columns in Detail and Power modes, under Folder Options, and save the Folder format for all folders. Then I click on a few folders in the Folder tree, and sooner or later, the auto-size feature stops working. So I go to Folder Options again, and the checkmark is gone.
Am I missing something here, or is this a bug?
Seems to be working ok now - don't know what I did wrong.
Same problem
Have a read the Folder Formats FAQ linked in my signature.
Right - I see what happened now. I turned off Enable Folder Content Type detection (which was an annoyance anyway), and then the Auto-size columns worked as expected.
Leo & Perb, thank you for the information 
grant