I just tried to export a selection of wiki pages from the admin interface. So I selected the pages, transferred them to the "selected pages" block, and hit the "create" button. The result was just an error stack displayed in the browser - but no PDF created. Error stack ends with:
TypeError: sequence item 0: expected string, NoneType found
(complete stack attached).
Configuration issue? Template issue, as the trace suggests (maybe connected to the problem described in #3779)? I used the latest code from SVN with the latest stable code of Trac 0.11 on Ubuntu 8.04.1 (Python 2.5.2, Genshi 0.5.1).