Router can be a culprit sometimes. I have an old Linksys and it sometimes start behaving funny, sch as giving me 30 KB/s on wireless. reset, disconeccting everythinga nd connecting wired fr 5-10 minutes and then back to wireless seems to do the trick. Also I have another DSL line with Thomson Speedtouch router, it also sometimes behaves silly, especially with many Andorid devices connected, sometimes it just oversaturates itself and turns on the red light on the front ... in that cas eit needs to be power cycled and then everything is OK.