Multiverse Feedback: Virtual Booster

Purple rarity    M  Suggestion I'd like to be able to make cards with purple expansion symbols.	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.	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.	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.	Application Errors    C  Error Frequently getting these Application Errors. On some days it's really bad. Loading a cardset or page requires many tries. If working on a new card, it could mislead you to resubmit several times, thus creating multiple copies of the same card. I assume this server runs on ASP.NET because I only ever see these errors on ASP served pages. Quite often, actually, not just this site.
Horizontal cards    C    Is it possible to have cards display horizontally – like plane cards?	Pinlines on gold flip cards    C  Bug Gold two-coloured flip cards don't get their pinlines.	Unusual boosters    C    Options for a cardset to have boosters that don't follow the 10 C / 3 U / 1 R/M distribution, or that ignore rarity altogether. If the idea isn't too crazy, boosters with a number of cards different from 15 is cool, too.	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.	Card art on tokens looks horrible    C  Bug
Skeleton generation is broken    C  Bug "Generate skeleton" gives an error for all cardsets. I think line 295 of cardset needs fixing.	More control over search results    C  Enhancement Sometimes people want more or different columns in their search results. I should make assorted columns visible with a checkbox-type toggle, like on the cardlist.	Warn if about to lose unposted comment    C  Enhancement If you've typed a bunch of text in a comment box, but then click "Edit card" or some other link, the comment isn't posted. I could make Multiverse warn you about the unposted comment, like Stack Exchange sites do.	View cards before publish    C    It would be nice if there was a button that allowed us to see what the finished card would look like before we create them.	More features for advanced search    B    Can you please give more features for searching cards on the advanced search page? I'd like features that allow us to search by mana cost and colors of the cards. These features haven't been added yet, but it would definitely help a lot if we can search according to mana cost, converted mana cost and colors because I'd like to see all the WUBRG cards in this website, for example.

Purple rarity (mythic)
Can't edit cards in Safiria (uncommon)
Frequent Heroku errors? (uncommon)
M15 flips are broken (uncommon)
Application Errors (common)
Horizontal cards (common)
Pinlines on gold flip cards (common)
Unusual boosters (common)
More options in Export (common)
Card art on tokens looks horrible (common)
Skeleton generation is broken (common)
More control over search results (common)
Warn if about to lose unposted comment (common)
View cards before publish (common)
More features for advanced search (basic)