[quote="DavidP"]Unfortunately I have to say that there is only one of the about 250 applications that I use which actually crashes more often than Dopus (that app being Dragon NaturallySpeaking).
For example, Dopus very often completely locks when a html file or mht file is pre-viewed in the preview pane.[/quote]
Didn't you trace the stability problems in Opus, at least when viewing HTML files, as coming from Dragon NaturallySpeaking (which loads itself into other processes)?
If it's causing problems why not turn off automatic size calculation?
I agree that having automatic calculation turned on can be annoying due to all the disk access generating information that you may not actually need at the time. I need the folder-size info rarely enough that I am happy triggering the calculation via a toolbar button. (Probably why it's off by default, though I can see it being useful to turn it on within certain directories that you know don't take long to calculate and often need the info for. You can turn it on, restricted to certain folders only, using folder formats.)
To get something on GPSoftware's radar it's best to contact them directly as they don't see everything posted to the forums.
If you don't want the information to be ready the moment you switch to the tab, why calculate it automatically at all?
Does that happen all the time or just sometimes? It doesn't happen for me so I'm wondering if there's more to reproducing it. If it can be easily reproduced by other people then it should be fixable.