Multiverse Feedback: Virtual Booster

Purple rarity    M  Suggestion I'd like to be able to make cards with purple expansion symbols.	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.	Different card frames    U  Enhancement Stuff like the old frame, PCH planeshifted, and FUT futureshifted.	+ / - buttons don't work any more    C    Looks like an update to Chrome's DOM handling has broken them.
Sort/show by Rarity buttons in Spoiler    C    It's probably been brought up and considered before, but I'd love the ability to show/hide cards of a given rarity in the Visual Spoiler, if not all relevant tabs.	Level-Up Cards    C  Feature Let us have a nice frame for creatures with level up.	Card art on tokens looks horrible    C  Bug	Cropping roll-over image    C  Bug When the tooltip image is larger than usual, e.g. the default for a cardset is to prefer images to mock-ups, the roll-over displays the card image, but (at least for me) the right edge of the card gets cut off, removing the P/T, loyalty, and/or mana cost.	Preview button for card editing    C  Feature It'd be nice if you could preview what a card would look like from the edit page. Particularly if you're trying to trim down the wordiness so that the text doesn't have to shrink so much.
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.	"Hide flavour text" button    C  Enhancement SFletcher suggests a switch to make flavor text visible/invisible. This would allow us to look at a card's rules text alone for reviewing clutter.	Tagging users    C    In a comment, there should be a way of tagging users, e.g. (((dude1818))) becomes [dude1818](http://multiverse.heroku.com/users/57/). This would require the ability for notifications first, but this is an added feature.	Return to previous page after login    C  Enhancement Not sure how feasible this is, but: if you're viewing a card, not signed in, and then you sign in, it'd be nice to return to the card you were viewing rather than be taken to the homepage.	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)
Frequent Heroku errors? (uncommon)
Can't edit cards in Safiria (uncommon)
Different card frames (uncommon)
+ / - buttons don't work any more (common)
Sort/show by Rarity buttons in Spoiler (common)
Level-Up Cards (common)
Card art on tokens looks horrible (common)
Cropping roll-over image (common)
Preview button for card editing (common)
Tooltips don't appear if hovered too quickly (common)
"Hide flavour text" button (common)
Tagging users (common)
Return to previous page after login (common)
More features for advanced search (basic)