It definitely looks like the center fuse had overheated to failure and fire by the looks of the copper in the second photo. If the fuse clips look good I would imagine the fuse itself may have developed a high resistance connection at the fusible element itself.
-edited for lack of spelling/typing ability-
[This message has been edited by Crowbar (edited 01-04-2006).]
[This message has been edited by Crowbar (edited 01-04-2006).]
