Nginx proxing to large remote svn repository

Hello all:
I currently have nginx 1.0.5 proxying http to remote svn server. The svn
repo is over 400G in size and constitutes all large binary files with a
active userbase of about 4000. All works fine connecting directly with
an svn client. Adding nginx in the mix we are seeing occasional time out
errors in the nginx log. I have adjusted the some of the config time
outs to be 75 seconds with no obvious luck. We are also seeing problems
with the svn clients aborting with no recorded nginx error.

What I am wondering is, are there buffering streaming other config
options that I am missing ? Should I move to a newer version of nginx ?

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