+1  A: 

EDIT: My initial response was incorrect. Use the numbered HTML escape (in this case ®) to get those characters into the sitemap.

Just put ® instead of what you have. The & is being escaped and then it just outputs the characters reg; because that isn't an HTML escape code.

Matt  2009-06-04 15:03:17
Nordes  2009-06-04 15:15:49
Ah, I see. Do '®' instead. Just tried it locally and it worked for me.
Matt  2009-06-04 15:35:56
Thank you, it worked. Can you update your answer so it's clear :D. Thank's again.
Nordes  2009-06-04 15:40:21

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