500 server error on /page2/

Hi,

It seems that I have a problem with this module on my blog. On tag pages in French, I get a 500 server error always for the “page 2” pagination. When i want to navigate to “page 3” it’s working fine.

In short, when a popular tag has for example 15 messages and there are 5 messages on each page, I can see page 1 and 3 but nog page 2.

I can’t seem to find a wrong redirect either that can explain this problem. Anyone a suggestion? Is this a known problem?

Example

http://blog.ava.be/fr/tag/serviette/page/1/ works fine
http://blog.ava.be/fr/tag/serviette/page/2/ 500 error
http://blog.ava.be/fr/tag/serviette/page/3/ works fine

http://ww.wp.xz.cn/extend/plugins/wp-pagenavi/