Funny I've found this thread by mistake and I must say I have the same problem. I change the speed setting in rutorrent but if I close the window and reopen it, the limit is back to no limit.
Now I understand wonslung's response but I need to ask this: if rutorrent is only a front end client to rtorrent, why do we have a text box in the settings box to change the speed settings? If I change this setting, lets say from no limit to 10kb/s, the speed will effectively drop to 10kb/s... so this setting must be more than just a nice text box!?
Also, I don't know for the OP of this thread, but I have set speed limits in rtorrent.rc and they seems to be ignored. From my rtorrent.rc file:
# Global upload and download rate in KiB. "0" for unlimited.
download_rate = 0
upload_rate = 10
When I launch rutorrent, the limits are set bak to no limit. In one day, I wasted 27GB of bandwidth uploading...
All other settings are used so this means that whatever is going on, the rtorrent.rc file is not completely ignored.