Heimdal 0.8.1 and Sun Java GSSAPI

[xdavid@svinew.natur.cuni.cz]

Hello,

it seems something has changet in GSSAPI implemented by Heimdal somewhere 
between 0.7.2 and 0.8.1 versions. My java based webapp cannot use gssapi 
anymore (Sun Java 6). The error is:

Message stream modified (41)

Is it a known issue ? How to resolve it ? Is it safe to downgrade heimdal 
to 0.7.2 in the case this is not resolved yet ?

Thanks in advance,

David Komanek