Also, is OD running as root/admin on the target ?
They said standard PLC workflow doesn't support fan out deployment.
O rly? You might want to tell support to RTFM. SiteDeveloper guide appendix E.
How do you have it configured w.r.t. proxy? If it's a full proxy (i.e. proxy / to :1776/) then there's no reason for it to lock any files deployed into LSDS. Are you perhaps only proxying .page requests, and serving up static files as a virtual directory? Are you using a RewriteMap+RewriteLock?