Using DW CS3 on a Mac, I've delete the MacFileCache.dat file, with DW closed, rebooted the system, rebooted DW. Tried reinstalling the extension. Checked the WebAssist Preferences. Still get the error message when it goes to create a preview.
I even downloaded DW CS4 trial, (tried all the same fixes) and I don't get the error message...but I don't get a preview in the CSS Menu window...I do get it in a browser if I click in the preview area...but I really don't want to upgrade to CS4 right now.
Any ideas. I submitted a trouble ticket 24hrs ago, but nothing yet.