Unable to create & delete categories in firefox

[norrs]

If I have javascript enabled in firefox, it doesn't let me create or delete categories.
If I try to delete a category, it popups an confirmation dialog if I want to, and I click yes and it's disappears. If I "refresh" the page / visit the same ​https://xxx/wp/wp-admin/categories.php - the category reappears.

It works as it should if I disable javascript in firefox. This both effects firefox (latest) on ubuntu 7.10 and on windows.

If I goto ​https://xxxx/wp/wp-admin/post-new.php and have javascript enabled, I'm supposed to be able to add categories from there too, but the same stuff happends here. After I try to submit , all fields just go blank as nothing happends.

Is this releated to -> ​http://trac.wordpress.org/ticket/5342#comment:2 ?

[JDTrower]

I am unable to recreate this problem in 2.3.1.

[lloydbudd]

Closing as Works for me based on JDTrower's update, and having never encountered the problem myself.