For about 2 weeks now, usually most recent videos have started to lag for me. changing down from 1080p has a small effect but it still starts buffering at random places.

Anyone else same issue?

yep, soon after 1080p started some problems like that started to occur for me aswell. At first I was watching 1080p, but now I went back to 720p, since it seems to run a little bit better. Dunno what the cause is, my connection runs with more than 3 mb/s, should be fine.
Well I am in germany, the problem just might the distance to the servers and the networks between me and them.

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Try doing a soft restart on your router. Everytime i have problems with streaming i do this and then it works.

Been getting this as well. I used to be able to watch 1080p with no problem. I have 30mb/2mb line with a stable actual download rate of 2.2-2.5mb/s

From what I have monitored, when viewing 720p videos I get a stream rate of 190k kb/s-290 kbs
1080 I get 180kb/s-250kb/s

Don't know why, but it was very recent that this happened.

Edit: I don't know why, but changing my DNS from google's to OpenDNS's seems to fix the problem.

Steps taken:
cmd with admin priv.> ipconfig /release>ipconfig /flushdns>ipconfig /renew
Test connection Same result with low download speed from CR.
Change DNS to OpenDNS servers from google's.
cmd with admin priv.> ipconfig /release>ipconfig /flushdns>ipconfig /renew
Test connection...stable download speed of 0.8mb/s-1.8mb/s achived.

Alot of you would benefit from utilizing speedtest.net, and choosing an American server to test from, California is a good area to test to.
I will tell you however that anywhere between 250 - 300KB/s isn't sufficient enough for stable streaming of 1080P, unless you wanna wait 5 minutes or so and then hit play, this goes for any streaming provider, not just CR. For videos around 20 minutes anyways Naruto for example will be about 190MB-200MB or so usually in 1080P, that's ranging 204,800KB, 10,000KB near about for 1 minute of video. It would take 34 seconds to load on 300KB/s, the streaming mechanisms on CR are a bit different though, as I believe it to be progressive live streaming instead of regular dynamic streaming in most flash video players. So every minute of video you could be processing the next minute for anywhere between 20 - 34 seconds, or whatever their server's intervals are setup at. I have 256KB/s consistantly because I'm on wireless, and SD has the best playback performance.