This upload fixes the issue:
gucharmap (1:1.6.0-0ubuntu2) dapper; urgency=low
.
* Rebuild so the cdbs magic will build a .pot for the help directory
(Ubuntu: #35403)
** Changed in: gucharmap (Ubuntu)
Status: Confirmed => Fix Released
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Help .pot file is not being generated
https://launchpad.net/bugs/35403