In article <9509251228.AA03238@banana> jtk@atria.com (John Kohl) writes:

   Turn off RFC1323.  See /usr/src/sys/net/tcp*.c (I forget where it's
   defined.)

   I have filed a PR with a sysctl patch that lets you change it on the
   fly, but that PR has languished for quite a while with no action.

While that will alleviate the problem, it's definitely *not* the right
thing to do in the general case.  The header compression code should
be modified to remove the extra options instead.