All access to the AppInputStream is supposed to be
synchronized by going through the appropriate
locks. int read(byte[] b) (are there others?)
doesn't do this!

What about:

available()
mark()
skip()...

And in AppOutputStream? Are there some in there as well?
Yes, we're missing:

write(int b)
write(byte [] b)

These should be fixed. Check with Jeff to be sure that
these are incorrect, but I'm 99% sure we screwed up.

Brad