i dont think its about deluge, ubuntu 10.04 has ram usage problems/bugs, if your ram's capacity is low its normal.. try to copy a huge file, probably it will crash again..

i recommend upgrade it or using debian..

i'm trying it too right now.. closed deluge and it's been transferring for 20mins and goes on..

hi.. i'm using deluge on debian testing.. my connection : 6mbit dsl but my download speed never reachs full capasity.. generally it dowloads between 250-350.. never saw 400+ , on my other computer which is windows based, with another torrent client when i want to get the same torrents it works 500-6...