Just getting started with CS5 having used Dw for many years...
New site. One template. 6 pages based on that template.
When I make a change to the template and save. The template file saves, but Dw does not offer to update the pages. I have to manually choose Modify>Templates>Update pages... to push the template changes through the pages.
Side note: Pages that happen to be open in tabs when the template file is saved, get updated immediately - no prompt.
Previous behaviour was to present with the "Update Template Files" dialogue showing a list of affected files and the choice of "update" or "don't update".
Bug? Or did I miss a preference setting?
While I'd like to know what the fault was, that there is a workaround is why I mark as answered.