I'm having an odd issue with the RPC API. Tools that work on Plesk 8.x servers are getting a 400 error when trying to connect to a Plesk 9.5 server. These are simple things, such as retrieving account information. There are no errors in /var/log/sw-cp-server/error_log and I can see the 400 errors in the /usr/local/psa/admin/logs/httpsd_access_log file. However, I can't seem to find any info on what is actually causing these errors. Any ideas? Any other info I could provide to help pinpoint this issue? Thanks.