strange xvid behavior

[moko]

I have a hard time getting the results I want from XviD lately. I'll start with my big problem: every time I encode with b-frames enabled, when I try to watch the final avi there's allways a problem about broken b-frames and missing reference frames, it allways occurs no matter of the other b-frames or general settings.
The second problem is not that disturbing but still bothers me: when I watch my encoded files (without b-frames of course) with the ffdshow OSD, frame type allways shows I and the quantizer ratio in unavailable. However, when I watch files that I downloaded frame type is correctly identified and so is the quantizer ration. Again, the "problem" occurs no matter of my XviD settings.

Here's my typical settings:

Motion estimation: 6
Quantization type: H.263 (1st pass)/New modulated HQ (2nd)
VHQ: 2
Max I-frame: fps*10 (250 for 25 fps, etc...)
Min I-frame: 1
QPel/GMC/Chroma motion ON. Lumi masking/interlace OFF
B-frames (when used): max 3/ratio 150/offset 100/threshold 0/DX50 B-VOP comp ON
Alt curve: ON/high dist 450/low dist 80/strengh 30/min relative quality 50
Debug: Chroma optimizer ON (don't know what it is, but it sounds nice...)/frame drop ratio 0

Any help, especially for the fist problem, will be appreciated.

[Kyo]

If you decode with ffdshow and active the 2nd "use XviD" the frame type or quant are not showed, may be the "others downloaded files" aren't xvid encodes?

[moko]

Kyo: thanks for the reply. deactivating the "use xvid" option did help and now I can see the types correctly. but as far as I remember the other files that I watched were xvid...

Anything about the first problem?