Multiverse Feedback: Virtual Booster

Purple rarity    M  Suggestion I'd like to be able to make cards with purple expansion symbols.	M15 flips are broken    U  Bug M15 flip cards render improperly, with the rare stamp jammed in the middle of the unflipped rules text, and the flipped P/T box trying to jump off the line.	Frequent Heroku errors?    U    I've been seeing a few Heroku errors on the page lately. It usually doesn't last, just half an hour or so, but it's a little odd. Wanted to ask about it in case it's slipped under the radar so far.	Can't edit cards in Safiria    U  Ongoing Bug When using Chromium on Ubuntu 12.04, I cannot edit cards that I have created — instead I get the "We're sorry, but something went wrong" page.	Cards have descriptions?    C    Could cards have a way to select a single comment as the cards description / rules clarification / whatever, to be shown in the various grid views?
Same card codes    C    An option for cards fighting for the same slot. Not sure how the skeleton would/should display it, though. Same card code may go against how you already coded things, but an alternative could be something like "CL05b", idk.	Allow easier card links in comments    C  Enhancement The ability to link to other custom cards with (((triple parens))) could be enhanced. Allow (((C1234))) to link card ID 1234, and/or uniquely-named cards in other cardsets.	Copy mechanics between cardsets    C  Feature It'd be nice if multiple cardsets could share a mechanic. Particularly obvious for several sets in the same block.	Mockups favoured over images    C  Bug In a cardset such as The Oncoming Storm where the default display is set to be the image, there are certain places where the mockup is still used. Most notably the hover tooltip on internal links. I should display an image if one's available and the cardset is configured to prefer images.	Card backgrounds on opera    C    Probably not a high priority, but using opera (11.51), the background colour for lands and multi-colour cards is bright cyan.
More options in Export    C  Feature The export page should offer more options and a way to export a subset of cards. There's somewhat of a continuum between the skeleton, the cardlist, the visual spoiler, a hypothetical printer-friendly playtest slips page, and the plain-text and CSV export.	Tooltips don't appear if hovered too quickly    C  Bug If you mouseover a Gatherer tooltip (a [[[link to a printed card]]]) before the page has loaded, then the tooltip won't show, and won't even show if you re-mouseover the same link after the page loads.	Transform cards    C    I am not able to create any transform cards. Please Help	Horizontal cards    C    Is it possible to have cards display horizontally – like plane cards?	Can't view large sets    B    If cardsets are too large, say for around 700 cards, I can't view them, instead Application Error shows up. This happens whether I use either visual spoiler or cardlist. Can you help me find a way to allow me to view a large cardset without experiencing problems or the Application Error?

Purple rarity (mythic)
M15 flips are broken (uncommon)
Frequent Heroku errors? (uncommon)
Can't edit cards in Safiria (uncommon)
Cards have descriptions? (common)
Same card codes (common)
Allow easier card links in comments (common)
Copy mechanics between cardsets (common)
Mockups favoured over images (common)
Card backgrounds on opera (common)
More options in Export (common)
Tooltips don't appear if hovered too quickly (common)
Transform cards (common)
Horizontal cards (common)
Can't view large sets (basic)