When I rename a category, all the links under it don't get updated. Instead they just disappear into thin air. When I open up the database, I see them still there, but the referencing is wrong.

Example: I change HTML/Reference_and_Tutorials to HTML/Reference.

Category is changed but all the links still say HTML/Reference_and_Tutorials.

This has to be fixed. Also, it'd be nice to have a feature to move categories or links from one place to another.