Fixed issue with sites that use custom database table prefixes.
Added new function to StrictlyPlugin class called format_sql which replaces prefix placeholders with the correct prefix.
Fixed issue related to sitemaps located in sub folders. Replaced custom function with a call to plugin_dir_url to get the URL for the plugin.
Fixed issue that meant category and tag rewrite values were being returned without a leading / since wordpress 3.1
Fixed issue so that custom pages were outtputted correctly.
Fixed issue that was related to WordPress changing their tag permalink structure from using %tag% to %post_tag% in version 3.1 that was causing urls to be outputted without the %post_tag% part of the URL being replaced with the tag description.
Changed how the gzip files are written out to try and fix a problem with SERPs not picking up gzipped files.