Hi Marcos and Emilio,

Yes, I do have: 
Versión Gufw: 10.04.4
Versión ufw: ufw 0.30pre1-0ubuntu2

Marcos, here I send you a new video of this bug along with its
respective log with script enabled (after cleaning registry and
reconfiguring Gufw), as per your request.

Otherwise, Emilio, concerning your question, I think it's safer to deny
everything, then to open just the 3 or 4 ports and protocols you do need
for surfing or mailing (and only outgoing, of course). This is also the
opinion of Simon Edwards (the creator of Guarddog).

And a Linux firewall can be (still) safer, if on a per-application
explicit permission basis (yes, like in Windows). This was the approach
of Tuxguardian or linux-firewall.org among others.

In Linux normally we do trust on the software we install (through
repositories), but as the number of Linux users increases, then not only
more malware creators will turn their eyes to this operating system, but
also more users will download applications from different websites or
other untrusted sources.

Both reasons seem to advise the use of on a per-application basis
firewall, also in Linux.

But, while somebody makes such per-application-basis firewall, the
ability to deny also outgoing connections it's quite welcome.



** Attachment added: "14-5-2010 GUFW 10.04 bug video .tar.gz"
   
http://launchpadlibrarian.net/48417567/14-5-2010%20GUFW%2010.04%20bug%20video%20.tar.gz

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GUFW erases the rule not selected to be erased
https://bugs.launchpad.net/bugs/578404
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