What are some of the causes for slow internet speed? How can you one minute have great speed and then 1 minute later you are back to the old days of dial up for the rest of the day? Lately this has been happening to me more and more and I really don't know what would be causing this. I haven't tinkered with anything on my iMac or MBP. I have a wireless Linksys router which has worked great with my Macs no problem. But now... now... I feel like chucking everything out of a window. I did a speed test and got 82kbps down 311kbps up. I have dry loop dsl, the basic which has worked great for me for the last 2 yrs. Thoughts?