[SOLVED] Not an IcedTea issue after all

I've recently begun having trouble logging into my Youtube account from my Mageia box, where it worked previously. I have multiple profiles associated with the account, and what goes wrong is the window where one selects which profile you want active stays completely washed out, never comes into focus nor becomes actually clickable. Haven't encountered any other websites with this problem. My other machines, running other distros, have no such problem with Youtube, having equally up-to-date (11_2_202_297) Flash plugin (or older, in some cases!), so that's not it. This leads me to suspect the other main web underpinning, java. Or in Mageia's case, IcedTea.
Mageia has (in repo): IcedTea6 1.3.2 mageia1.1.mga3-i386. Firefox 17.
My SimplyMEPIS 8.5 (kernel 2.6.36 !!!) box has: IcedTea6(b18) 1.8.13-0+squeeze2. (Debian backport?) Manually upgraded to Firefox 22.0.
My PCLOS 2013 box has: actual Java plugin (1.6.0_45, manual install, a little old and needing update...). Firefox 21 in-repo.
Hm. Maybe Firefox itself? Still, its not *that* old.
Obviously, I could simply drop IcedTea in favor of actual java(tm) on this (Mageia) machine as well, but other people might not regard that as an option. I prefer to stay in-repo as much as possible. The devs have been doing such a good job everywhere else, I hope this isn't too unreasonable a request. Although, now that I think about it, more up-to-date Firefox would be nice, too? In your infinite spare time of course
Thank you.
Mageia has (in repo): IcedTea6 1.3.2 mageia1.1.mga3-i386. Firefox 17.
My SimplyMEPIS 8.5 (kernel 2.6.36 !!!) box has: IcedTea6(b18) 1.8.13-0+squeeze2. (Debian backport?) Manually upgraded to Firefox 22.0.
My PCLOS 2013 box has: actual Java plugin (1.6.0_45, manual install, a little old and needing update...). Firefox 21 in-repo.
Hm. Maybe Firefox itself? Still, its not *that* old.
Obviously, I could simply drop IcedTea in favor of actual java(tm) on this (Mageia) machine as well, but other people might not regard that as an option. I prefer to stay in-repo as much as possible. The devs have been doing such a good job everywhere else, I hope this isn't too unreasonable a request. Although, now that I think about it, more up-to-date Firefox would be nice, too? In your infinite spare time of course
