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Having same issue. Any resolution to this?
Contribute CS3 (user base utilizing)
site made with server side includes with css called in one of those includes.
Edit mode does not render CSS but normal Browsing in Contribute does.
I am having the exact same problem. Any suggestions?
Only way I've found out how to do it is by creating a import.css file that you link to from your parent header (non server side include).
Then in the import.css file (or whatever you've called it) you import all the style sheets you need from there.