Do you mean large single files, or large batches? I've had problems with large batches (e.g. games), and found that the FTP server in XBMC was slightly more reliable - but slower, and still not bomb proof.
FYI, I am using UnleashX 0.39.0528A Build 584 - the latest one I could find. I've never tried an older version, so I don't know if the FTP in them is any more robust. Also FYI, if you look at the log file for the connection it says "215 UNIX emulated by [UnleashX] Avalaunch 0.47.5", which is the same as the version reported by the latest Avalaunch build I can find (0.49.3.138) - which would imply that Avalaunch will be no better or worse.......!
This post has been edited by Heimdall: Oct 7 2008, 11:45 PM