Problem committing 1.8 client to 1.8 server

I'm having problems committing from my 1.8.X client to a 1.8.3 server.
When I try to commit, I get the following error:

svn: E175013: Commit failed (details follow):
svn: E175013: POST of '/svn/!svn/me': 403 Forbidden (<url>)

I've checked with both 1.8.1 and 1.8.3.

The Apache logs show the following:

[Mon Sep 16 16:08:17 2013] [error] [client <ipaddr>] ModSecurity: Access
denied with code 403 (phase 2). Operator EQ matched 0 at REQUEST_HEADERS.
[file "/opt/mod_security/10_asl_rules.conf"] [line "64"] [id "390616"] [rev
"2"] [msg "POST request must have a Content-Length header"] [severity
"WARNING"] [hostname <hostname>] [uri "/svn/!svn/me"] [unique_id <id>]

I am able to commit perfectly fine with 1.6.17, so it doesn't seem that
there is a configuration issue, but I don't know for certain. Is this a
configuration issue or a bug?

-Robert Middleton
Received on 2013-09-16 23:21:45 CEST