Oh, also, I've tried to just print the cards straight up from the visual spoiler, but for some strange reason the frames don't print in color, just the expansion symbols. I can't figure out if this is a you problem, or a me problem, so I'm throwing that out there.

Darn, my apologies - that's a silly bug I introduced trying to make printable mode omit as much as possible. It omits slightly too much. I'll get that fixed ASAP (hopefully tonight).

As for the VS colourlessness when printing, yeah, looks like I can reproduce that too. It seems like a CSS media issue, but I'm not using CSS media restrictions. I'll investigate.

Right. This is mostly fixed. The error on clicking "printable" is fixed. The VS colourlessness is fixable in Firefox and IE - you just have to hunt the "Print background colours and images" option.

Chrome, astonishingly, don't give this option to the user. They leave it entirely at the webmaster's discretion which backgrounds should be printable. I've added the obscure proprietary CSS tag to make the colouring work in Chrome, but it seems this feature is very new and rough in Chrome (it only works at all in Chrome 17+); in particular, gradient backgrounds go horribly wrong. For the moment I've disabled any attempts to print gradients in Chrome, which means multicolour and artifact cards look less nice, and hybrid cards just come out horrible.

I'm left with no choice but to recommend against printing Multiverse cards from Chrome for the moment. Use IE or Firefox instead :/

Further reading: how to enable printing backgrounds in assorted browsers, the bug report I submitted to Chrome for the gradients issue