The problem will be that the file is trying to call a CSS file and that link is being run through the same ReWrite rules as the filepath.
You can solve this problem by using the “root link” format, eg <link rel=“/styles/sheet1.css”> where that first / tells the browser to start in the root folder, regardless of what folder the current file is in.
You might benefit from reading the mod_rewrite tutorial linked in my signature as it contains explanations and sample code. It’s helped may members and should help you, too.
Stevie - what does that mean? Your comment would be valid if the css file name started with one or more digits but …
Sorry, I was looking at the examples, where Chris used “about” as the file name without any digits - I just assumed that the code was right for the examples given
The served file is /content.php, but accessed through /content/ so all support files don’t work anymore (wrong path, if the support URLs are relative).
So, Stevie’s comment is indeed valid, as is his solution (use absolute paths instead of relative paths)
(an alternative would be to use the html <base> tag)