404 returned for categories with high ID

[Joti]

When trying to view the posts in a category, error 404 is returned if the category ID is greater than 233. This problem exists for every category over 233, but doesn't seem to affect any of those under or equal to 233. Other than that, the categories work perfectly.

I'm using WordPress 2.0.5, with the permalink structure "/YYYY/MM/DD/post-slug/" and "/tag/category-slug/".

Category which works (ID 233): ​http://blogg.gurka.se/tag/axel
Category which doesn't work (ID 234): ​http://blogg.gurka.se/tag/goir

[foolswisdom]

Joti, can you upgrade to 2.0.7 and confirm you experience the problem there? Also can you upgrade to 2.1 in a test environment and confirm you see it there? (if you don't have the time or resources feel free to provide me a backup of your database).

[Joti]

I upgraded, and the problem remains in 2.0.7. The WordPress 404 page is now shown instead of the generic PHP error page (which is good), but I suppose that's another issue. I will try with 2.1 in a while.

[Joti]

Something interesting that I found out: On the 404 page, the category's title is still displayed (as opposed to if I try to view a category that doesn't exist). Also, the categories are not echoed by list_cats(). However, if I remove the apply_filter()s from list_cats() (lines 330 and 403 in template-functions-category.php, list_cats() shows all categories. I was unable to backtrack the problem any further.

[Joti]

Never mind, problem "solved". It was an issue with the ​Category Visibility plugin, causing all categories after the hidden ones to be invisible under certain circumstances. Either that, or I have to set new settings for every new category. Anyway, I just inactivated the plugin.

Thanks for the help, foolswisdom.

[foolswisdom]

Joti thank you for the excellent follow through!