Well we recently discovered that the module suffix $dh_sModSuffix is added to the page title even when a module level override has been defined, as per: http://www.ravenphpscripts.com/postt19074.html

no biggie
I gathered that it was not intended to function that way, and will possibly be "enhanced" in the future to change that.. If that is so, I thought I might make a suggestion regarding how the prefix is handled...

@ current it is only added if there is no override defined...

(includes/nukeSEO/dh/dh.class.php)

Code: if (empty($meta['title'][1])) $meta['title'][1] = $this->getModuleTitlePrefix();

but it could be very handy for adding some more descriptive titles to pages that don't fit within the nukeDH system, for instance, Content Plus tags:
http://slaytanic.sourceforge.net/modules.php?name=Forums&file=viewtopic&t=162

so in short my suggestion being the prefix always be added if it exists, and do whatever you want with the suffix, lol..