WP Super Cache readme states that you can't use mod_rewrite when using fragment caching (keeping certain parts of the page dynamic with mfunc/mclude) - you have to switch to either PHP or legacy mode. Interestingly enough, I used mfunc with mod_rewrite mode and everything seems to be working correctly.
Is there any difference? I mean, does WPSC simply revert to PHP for all files, or is it actually smart enough to serve files without dynamic parts using mod_rewrite, and files which have mfunc in them using PHP - if that's even possible?
Everything seems to be working fine either way so I'm just asking out of curiosity, hope you don't mind.