Since updating my NBM 3.9 server to SP1, users are reporting problems with large files not downloading properly. Iíve been able to reproduce this issue on various sites, including while trying to download NW65SP7. It seems most prevalent in the afternoon when the server is busiest. Essentially large file downloads (with IE7 or Firefox) will hang part way through. Restarting the download usually does not solve the problem. Iíve tried clearing the cache but that doesnít seem to help either.

Any suggestions??

Server config: NW65 SP6, NBM 3.9+SP1, HP Proliant DL385, 6GB RAM, 3x24GB cache volumes, CJís proxy.cfg rev 27 and tuneup.ncf rev 2.