That's odd. I use a CR-48 myself, running Google Chrome on my Chromium. I haven't had this issue... could Ubuntu be causing this problem? It seems unlikely from my scant knowledge on the subject...

Might could be. Editing cards works fine in Windows, but that has a separate thing where it'll just stop internetting after a few hours, so I'm reticent to reboot into it right now.

And if Ubuntu is the problem, then I've no idea where to go next. :/

Edit: When I try to edit this card, it works just fine. >:?

"Cardset options look like that shouldn't be the case. If it happens again, let me know in a comment and I'll check it out."

It keeps happening. Why. :(

Suggestion: Explain in detail exactly what things you are clicking, and what the result is. At what step does the edit fail?

There IS a known bug involving preview - if you've previewed a card you can't then submit the edit (it gets stuck in "I am previewing" mode, somehow). The workaround for that is listed somewhere else in this feedback set; but the workaround I remember is just "Never ever hit the preview button"

Yeep! No, I get an error trying to edit your cards too! (In Safiria.) Something's very wrong with that cardset. I'll look into it.

I click the "edit" button above the card when viewing its page, and at that step the attempt to edit fails.

It also occurs with Chrome and Opera on Windows 8.

Strangely, I can edit cards that I make now (e.g. http://multiverse.heroku.com/cards/22405), but not old ones.