What Have I done here

ok I axadently pressed a button and I cant figure out what I have done, http://img844.imageshack.us/i/screenshot20100901at104.png/

theres a link to the screnshot.
I would like to set it back so I can see the solid

Did you press Z?

Nope, the ‘accidental’ button press was the one that ended up posting a support question in ‘News & Discussion’…