Sorry but I can't really believe that Phex is truncating anything on TCP level. The implementation is very high level and is not doing anything TCP related.
If anything is truncated at such a low level, its either because of a bug in the Java VM, OS or something similar.
Additionally there are no connection problems with other client. I assume the interoperability problem is not caused from such a low level problem like faulty TCP packages.

Gregor

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