cache_serials and non-cacheable plugins

Hello! I'm having some problems, which seems to be (without deeper knowledge of Smarty internals) originating from how cache_serials are generated (md5(uniqid())). I have a couple of webservers. The compiled templates are stored locally on the webservers. The smarty cache-files are stored on a shared storage. The templates in question are componized, made of parts which are cached seperatly (by using a second instance of smarty and doing $cache_smarty->fetch() and then $smarty->assign() the result to the main template). I also have a function plugin registered as non-cachable. When the cached part of the template is shown it also shows a string like " {nocache:d41d8cd98f00b204e9800998ecf8427e#0} ". Obviously it seems like Smarty cannot replace the nocache-part with the appropiate function. Any ideas how to solve this? It would be good if the serials wasn't timebased (uniqid()) because the clock of the different webservers in a cluster is never completely synched. /Nichlas