Both wXw.twitch and wXw.ekstrabladet come out as clean at the moment.

http://www.urlvoid.com/scan/ekstrabladet.dk/
http://zulu.zscaler.com/submission/show/e676cb2da28b61bcb82a91b9cc5fc50f-1383079516
http://urlquery.net/report.php?id=7286497
http://www.mywot.com/en/scorecard/www.ekstrabladet.dk
http://www.urlvoid.com/scan/twitch.tv/
http://zulu.zscaler.com/submission/show/f8d4d357b5ac067ad05de7d43e78bfe6-1383080029
http://urlquery.net/report.php?id=7286730
http://www.mywot.com/en/scorecard/www.twitch.tv

Possible iffy add-ons or rogue toolbars present in your browsers? Browsers clean? Neither DavidR or Eddy are reporting issues.

Only thing showing is a redirection for ekstrabladet in zulu and a minor elevation in risk in zulu Netblock size. Otherwise everything looks normal from here.