I realize it is not a popular thing to have someone with no name, but still it is better to close the bug. Sorry.
Update: Same happens with "unknown" individual, that is no surname, just first name. Edited: Saturday, December 9, 2006 by MR
It consistently happens, however, on my IE6 (SP2), checked after restart.
Ron, can't it be somewhere between script.js and Explorer Tree?