pidgin (py25-gtk) wont upgrade

[mururoa]

Hi there,

I'm using 7.2 release with system and port tree up to date.
I get security warning using portaudit :

mururoa2# portaudit -Fda
auditfile.tbz                                 100% of   57 kB   52 kBps
New database installed.
Database created: Sun Sep  6 09:10:03 CEST 2009
Affected package: pidgin-2.5.7
Type of problem: pidgin -- MSN overflow parsing SLP messages.
Reference: <http://www.FreeBSD.org/ports/portaudit/59e7af2d-8db7-11de-883b-001e3300a30d.html>

Affected package: libpurple-2.5.7
Type of problem: pidgin -- MSN overflow parsing SLP messages.
Reference: <http://www.FreeBSD.org/ports/portaudit/59e7af2d-8db7-11de-883b-001e3300a30d.html>

Affected package: linux-pango-1.10.2_2
Type of problem: pango -- integer overflow.
Reference: <http://www.FreeBSD.org/ports/portaudit/4b172278-3f46-11de-becb-001cc0377035.html>

3 problem(s) in your installed packages found.

You are advised to update or deinstall the affected package(s) immediately.

But I cant upgrade anything of that.
I cant upgrade linux-pango but I guess it's normal since there is no new version without security problem.
But when I try to upgrade libpurple or pidgin (pidgin depends of libpurple) I get this :

# portupgrade -R pidgin
.
.
.
py25-cairo-1.8.8 needs Python 2.6 at least. But you specified 2.5.
.
.
.
** Listing the failed packages (-:ignored / *:skipped / !:failed)
        ! multimedia/gstreamer-plugins-dvd (gstreamer-plugins-dvd-0.10.12,3)    (unknown build error)
        * multimedia/gstreamer-plugins-core (gstreamer-plugins-core-0.10_10)
        ! net-im/libpurple (libpurple-2.5.7)    (unknown build error)
        * net-im/pidgin (pidgin-2.5.7)

So I try to upgrade py-gtk2 only and get the same error :

mururoa2# cd /usr/ports/x11-toolkits/py-gtk2
mururoa2# make reinstall
===>   py25-gtk-2.14.1_1 depends on file: /usr/local/lib/python2.5/site-packages/cairo/__init__.py - not found
===>    Verifying reinstall for /usr/local/lib/python2.5/site-packages/cairo/__init__.py in /usr/ports/graphics/py-cairo
===>  py25-cairo-1.8.8 needs Python 2.6 at least. But you specified 2.5.
*** Error code 1

Stop in /usr/ports/graphics/py-cairo.
*** Error code 1

Stop in /usr/ports/x11-toolkits/py-gtk2.
*** Error code 1

Stop in /usr/ports/x11-toolkits/py-gtk2.

I googled and searched but nothing found.
I'm lost there, what is the problem ?