I have an issue that, I think, is there since the latest theme update.
My tag archive pages (ie the page that’s being displayed when clicking a tag link in the tag cloud) only displays the latest post of that tag. And it doesn’t show the usual summary (= first characters of the post, as configured on my blog). This used to be working normally.
Example : http://www.geekdad.fr/tag/lego/
The time archive pages seem to be working ok. Example : http://www.geekdad.fr/2012/02/