i tried to login/register via ssl (https://), but didn't find it...

Please detail the problem you are having. I can access the Forum over SSL without issue.

ok, i entered 'http://forum.kde.org' into the address bar and followed the links to register here.

there was never ever a link to the https:// for submitting login and password secure...

why did i have to enter https:// manually? why is there not an automatic switch from http:// to https:// as soon as a password is submitted?

Unfortunately phpBB does not offer a secure logins only option - and we do not want to mandate visiting the forum over SSL because that means the various resources on the page cannot be cached - increasing the load on the server.

that may or may not be a valid argument.

but at least a link at the login page to switch to ssl should be offered. or a https:// link in the html-form for secure submission...

but that's probably just me, everyone else doesn't seem to care. so don't bother...

We'll be discussing in the team to see if a forum modification would be appropriate in this case.