Bingo.
This solved the problem!
The mail still doesn’t contain any carriage return line feed, but it contains the token now.
Thanks!
Von: dubeaud [email removed]
Gesendet: Donnerstag, 5. September 2013 18:17
An: Alexander Knopp
Betreff: Re: Can't login after update from version 1.2 to 1.5 [bugnet:455400]
From: dubeaud
in the /templates/text/ForgotPassword.xslt file, replace
Account/PasswordReset.aspx?token=<xsl:value-of select="Token" />with
Account/PasswordReset.aspx?token=<xsl:value-of select="string" />