Not ugly URLs, like this one, are now working here. It took quite a bit of hacking and use of mod_rewrite but it appears to be ok now.
The number of mod_rewrite rules in the .htaccess file has gone up, mostly to avoid the problem of css styling disappearing. This line takes care of it:
RewriteRule ^(.*)archives(.*)/templates/(.*) /users/$1/templates/$3 [L]