openSuSE 10.3 64bit and Vodafone Easybox

installing the Vodafone Easybox on a IBM Lenovo T61 is actually very easy following the tutorial given here. But I found adding the online repositories is not possible because adding them yields an error saying "Empty Server Response". I personally guess, that this has something to do with the compression the APN "web.vodafone.de" uses (probably a somewhat transparent proxy). With a normal WLAN connection there was no problem using online repositories at all so there couldn't have been a problem with all the servers. At least, one can use Email-Services and access html pages without any trouble.