Encoding in bitrate managed mode crashes sometimes with 
EXCEPTION_ACCESS_VIOLATION. I have a sample file deterministically producing 
the error with oggenc.exe. Please let me know if you need this file.

> oggenc -r -R 22050 -b 32 -M 128 samples.raw

is the command line producing the error (samples.raw has length 819 200 bytes).

NOTE: encoding in VBR mode succeeds:

C:\oggtools>oggenc -r -R 22050 -b 32 -M 128 samples.raw
Enabling bitrate management engine
Encoding "samples.raw" to
         "samples.ogg"
at average bitrate 32 kbps (no min, max 128 kbps),
using full bitrate management engine
        Encoding [ 0m02s so far] |


crashes while

C:\oggtools>oggenc -r -R 22050 -b 32 samples.raw
Encoding "samples.raw" to
         "samples.ogg"
at approximate bitrate 32 kbps (VBR encoding enabled)
        Encoding [ 0m01s so far] -

Done encoding file "samples.ogg"

        File length:  0m 09.0s
        Elapsed time: 0m 01.0s
        Rate:         9.2880
        Average bitrate: 38.0 kb/s


succeeds.