Another 'data too long' error....
Using Jamroom
How big is your profile???? For me that cat_update_user field is a TEXT field which should be plenty big enough.
Could you take a look at:
ACP -> DEVELOPER -> DEVELOPER TOOLS -> TOOLS -> DATABASE ADMIN
In the left hand column at the top you will see a search box, in that type "cate" that should be enough to limit all the tables to where you only see:
jr_jrforum_category
click on the text 'jr_jrforum_category'
(not the icon, thats different.) and take a screenshot of that for me please. the cat_update_user table should read TEXT i'm wondering if your's says something else.