i switched from PC to Mac very recently and all was going well until i started to use Transmission 1.72. I have not used the speed limit, i changed port to 63064 - forgotten why!, DL rate- un-limited, UL rate - limited to 58 KB/s, port-forwarding is switched on.
i'm new to downloading torrents. don't get me wrong - it seems simple, stylish and is obviously a lightweight piece of software but since installing it and starting to download my first (very large) torrent, it has started to make my Mac behave like my PC used to. here's what happens:
- i will open Safari which behaves very slowly. after a while, usually when refreshing or launching tabs, i will get the beachball of death.
- sometimes i can't force quit Safari or other software such as Lightroom 2.4 that has ground to a halt.
- i can NEVER force-quit transmission when this is happening.
- i have to hold the power button and do a cold shutdown to resolve the situation...i hate doing that.
- maybe it's worth me mentioning that the only third-party app which is running in the background most of the time is Quicksilver.
luckily, on resuming transmission the torrent continues to download as though everything is good...but the crashes are happening very frequently. i would try out a nightly build but given this torrent will take at least 7-10 days to complete at the current 'traffic-shaped' rate, i'll have to wait...i have downloaded nearly 10 of 52Gb so am currently a bit committed....that has taken the best part of 3 days!
there's no mention of Transmission in Crash Reporter and no mention of the words 'assertion failurs' re: Transmission in the Log Database Queries (although the word Transmission is mentioned).
i have some further questions:
- is there any chance that the shutdowns and reboots, which mean Transmission is being forced to quit mid-flow and then being relaunched, will end-up with my downloaded files being broken/fractured? i've noticed tonnes of references to 'check sum tests' that have 'failed' in the Transmission Message Log...easily 200 or so...

pps- could i stop the download, install the latest nightly-build, and resume from where i left off with the torrent? how would i go about this?
pps - i use TalkTalk as my ISP - the max i get is 100 KB/s DL rate. it goes over that every now and then but only momentarily. is this due to the traffic shaping or some other reason.
many thanks for any help.