Crazy- Showcase disappears (on strike perhaps?) and Category Complains

So I had it looking good

Category issue

I went in to change some categories associated with articles..most went fine

However I changed this one category from Umass Disciplinary hearings (which was the title of a post- I changed so no duplication)
To UMASS.
attached screen shot

The result was:

Not Acceptable

An appropriate representation of the requested resource /administrator/index.php could not be found on this server.

Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request.

Then to make matters worse

Showcase issue

I changed showcase to only appear on selected pages and selected HONE
It disappeared from all

So I tried selecting all again''

and here is what I get IIy=t will not bring back showcase

http://www.dansandell.com