Symptoms
Unable to see a new category created. Also, being directed to kb_home.do instead of $knowledge.do
Release
Jakarta Patch 8a
Cause
The users are being directed to old knowledge homepage because of the module's link type.
Resolution
When the users are directed to $knwoledge.do the newly created category was seen under the correct knowledgebase.
Advise to go to all the modules which direct users to the old knowledge homepage and change the link to new knowledge homepage.