[fu86]

"We have detected that your operating system does not meet the optimal webcast specifications for listening to and/or viewing webcasts. We recommend the following operating systems: Windows 7 or Windows XP SP2, and Mac OS X 10.4. Please note that users with older versions of Windows (Windows NT 4.0, Windows 98, Windows ME, Windows 95), Mac, Linux, and Unix operating systems may or may not experience difficulties listening to and/or viewing webcasts. Please contact your network administrator regarding any operating system upgrades."

Is this just a relict from the past or is this a showstopper for me? (I use an Debian-based system)

[statenjason]

I'm running Arch and received the same message. Ran the test video and it seems fine to me. Likely what they're saying is that they don't promise compatibility with Linux.