Subscription verification problem

[chico_html]

Hello,
I found a problem in the newsletter's module. The verification and deletion of subscriptions by the users is not working as it should.
When the user receives the verification's email, they click on the verify/delete link and sometimes it doesn't work.

According to some testings I made, the problem seems to happen when the address_key has a plus symbol (+) in it.
Instead of the verification page, it redirects automatically to the frontend's homepage and it doesn't modify the database.
If the address key has NOT a plus symbol, the behavior is correct.

I'm running the last version of the CMS (r402), PHP last version, Apache Server on Windows.

Where could the problem be? How can this be solved? Any help is welcome.

Thanks

[chico_html]

The problem was solved. Oliver corrected some files and made them available in Google Code.
If anyone has the same problem or is interested, see more details and download the patch in:
http://code.google.com/p/phpwcms/issues/detail?id=245

Thank you!