Hi Leo and thanks for the fast reply.
That once seemed to have influenced the problem, but doesn't solve it (at least not anymore).
For example, also when NaturallySpeaking is not running, and Dopus displays a mht file in the preview pane. Then, you want to leave that file and display a simple JPEG or something instead. Dopus then either will lock up completely, or will lock for about 30 seconds, and only then will change over to the next file that was selected in the lister. This is all with IE6 since with IE7, the previewing problems were even much worse.
I need it all the time, am used so much to the folders displaying a "relative size" bar in the lister. This btw. should be a natural feature of the leading file manager on the market.
Well I want the information ready, so that is only a proposal for a workaround.
BTW, the folder size information could be simply stored in a hidden text file of the superordinate folder, together with the information ABOUT THE SORT ORDER of the files in that folder.......................................!
This problem only happens sometimes.
David.P