I know that questions like this have been asked umpteen times, but I've been searching for a couple of days and haven't yet found where the problem is.
I have a fresh WP Multisite install with subdomains. The only activated plugin is WP MU Domain Mapping (0.5.4.2).
Home site and new sites on subdomains work as expected, ie, pretty permalinks working fine, images working, etc.
However, on domain mapped sites, pretty permalinks don't work - only default permalinks - and images are broken even in the back end.
I would appreciate your help.