sorry, I don't want to get over the developer that seem to have done a good work, but I got tons of "Notice" errors (ok, now the fashion is that they are not errors but your fault because you do not edit php.ini), and I finally obtained a Fatal error: Undefined class name 'loggermanager' etc.. this seem to be an almost year long problem, as in the forum support there's an unresponded august 2006 question about it.
well, I know this will sound annoying and ungrateful, but I just can't spend days going after this: I am really sorry but I think I'll look somewhere else for a joomla tag cloud, or otherwise forget about tag cloud.
one last thing: the component submenu could be shortened a lot.