TOR_SOCKS_HOST, TOR_SOCKS_PORT regression

TBB 2.3.25-2 not affected. TBB 2.3.25-3 not tested (not available for download). TBB 2.3.25-4 introduced this bug.

I am using /etc/environment on Debian Wheezy.

TOR_SOCKS_HOST="192.168.0.10"
TOR_SOCKS_PORT="9100"

,,(I am using a patched startup script, which starts "./App/Firefox/firefox --profile Data/profile" instead of "./App/vidalia --datadir Data/Vidalia/ -style Cleanlooks".)

When Tor Browser starts, it automatically opens https://check.torproject.org/?lang=en-US&small=1&uptodate=1 as expected but says:

The proxy server is refusing connections
Firefox is configured to use a proxy server that is refusing connections.
Check the proxy settings to make sure that they are correct.
Contact your network administrator to make sure the proxy server is
working.

All other pages are working.

https://check.torproject.org/ can not be reached until Tor Browser is restarted. Before the browser gets restarted it always says "The proxy server is refusing connections" even when trying to reload or in new tabs.

After Tor Browser has been restarted, everything works.

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