I can confirm the problem / bug - for me it looks like a simple typo in "seperation" in line 73 of enigmailSingleRcptSettings.xul:
IS: <description width="130px">&enigmail.sepratationDesc.label;</description>
SHOULD MAYBE BE: <description width="130px">&enigmail.seperatationDesc.label;</description>
Unfortunately I'm not able to repair/fix it locally to confirm, didn't found out exactly how to rebuild the jar-file.
I can confirm the problem / bug - for me it looks like a simple typo in "seperation" in line 73 of enigmailSingleR cptSettings. xul:
IS: <description width=" 130px"> &enigmail. sepratationDesc .label; </description>
SHOULD MAYBE BE: <description width=" 130px"> &enigmail. seperatationDes c.label; </description>
Unfortunately I'm not able to repair/fix it locally to confirm, didn't found out exactly how to rebuild the jar-file.