Cannot build gstreamer-plugins

[iop]

Hi,
after a recent (yesterday) portsnap I wanted to update my ports with 
portmaster -a but it keeps getting error on updating gstreamer-plugins. 
The error is:

gmake[4]: Leaving directory 
`/usr/ports/multimedia/gstreamer-plugins/work/gst-plugins-base-0.10.30/gst-libs/gst/pbutils' 

Making all in riff
gmake[4]: Entering directory 
`/usr/ports/multimedia/gstreamer-plugins/work/gst-plugins-base-0.10.30/gst-libs/gst/riff' 

   CC     libgstriff_0.10_la-riff.lo
   CC     libgstriff_0.10_la-riff-media.lo
   CC     libgstriff_0.10_la-riff-read.lo
   CCLD   libgstriff-0.10.la
   GEN    GstRiff-0.10.gir
g-ir-scanner: warning: Option --strip-prefix has been deprecated;
see --identifier-prefix and --symbol-prefix.
/usr/local/share/gir-1.0/GstAudio-0.10.gir: Incompatible version 1.0 
(supported: 1.2)
gmake[4]: *** [GstRiff-0.10.gir] Error 1


My machine is (i5):

FreeBSD **** 8.1-RELEASE FreeBSD 8.1-RELEASE #0: Mon Jul 19 02:36:49 UTC 
2010     root at mason.cse.buffalo.edu:/usr/obj/usr/src/sys/GENERIC  amd64

I've also tried rebuilding manually: gstreamer, v4l_compat, ocr, 
gir-repository, and object-introspection, and it didn't help. There is 
also my post on FreeBSD forum where nobody seems to have a similar 
problem: forums.freebsd.org/showthread.php?t=19712. I hope you can help me.

Greetings Fatfredyy