iwproxy memory consumption

System

iwserver: 5.5.2 Build 20638 Interwoven 20030604 on Windows 2000.

iwproxy has consumed almost 500MB of RAM. Could this be bugs in proxy configuration (which is minimal here), or is this a bug in the proxy itself? I remember some posts in the wayback machine about iwproxy memory leaks, but I thought they had been fixed long ago. Am I just on an obsolete build? Unfortunately it looks like it would be very hard to get any patch into production here. Is there any alternative but to just restart the service periodically?