[OSM-newbies] Change username

[Xan]

Hi,

I change display name in my profile (from "Som en Xavier" to 
"somenxavier"). Now the page
http://www.openstreetmap.org/user/Som%20en%20Xavier
put an error. Is there any way to automatically redirect this to the 
actual page http://www.openstreetmap.org/user/somenxavier?
how happens with my old edits. Is it someway to attribute my old edits 
to my new display name?

Thanks in advance,
Xan