All dl's quit in about a minute

[Chaitanya]

Sorry if this question's been answered a million times and I can't figure it out.

Reasonably experienced user, LW 5.5.10 on a MacPro 6g ram in Snow Leopard 10.6.4. No firewalls and no performance filters in LW. No limit on dl bandwidth; upload bandwidth limited to 750kbs and 10 uploads at a time. FIOS connection, 25/20; bandwidth should not be an issue.

17 dl's at this time, all connect to 8 or 10 p2p users. I have a full connection sharing 373 files.

They begin rapidly, then decelerate to 0kbs in about a minute. Then LW becomes unresponsive, won't even forcequit, and hangs Finder and the entire system, requiring a hard and very unpleasant restart.

LW status bar indicates the full connection remains and still sharing.

This is a new occurrence as I've been using LW on this system for many years, even after the recent LW, OSX and Java upgrades.

A few of these files, I think, are being requested from specific hosts; meaning I chose 'browse host' and requested files. Not sure if this has any influence, but its the only thing I've done differently than usual.

I created a new admin account on my mac and ran LW from there. Didn't request to browse any hosts and the problem does not recur.

Thanks!