Multiverse Feedback: Virtual Booster

Levelers    M  Legendary Feature	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.	Different card frames    U  Enhancement Stuff like the old frame, PCH planeshifted, and FUT futureshifted.	Per-user popups with prefs    C    Original content lost to spam attack – sorry. It was something like: 1) Allow users to set a flag saying "I'm happy to receive templating advice". It should default to off. 2) Make an info panel pop up on mouseover of a user name, showing this flag's status.
Split and Flip Cards    C  Feature Allow us to create split and flip cards.	Level-Up Cards    C  Feature Let us have a nice frame for creatures with level up.	Error page mouseover and centering    C  Bug – Graphical If you hover over a link to a card that doesn't exist, the mouseover "image" loads from an error page, but since it uses a centered text box, it has the undesirable side effect that all the text fields on the existing page also become centered.	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.	Card history    C    When someone edits a card, they have the ability to comment on their change. I think it would be nice if there was some way to view older editions of a card as well, like on Wikipedia. That way, you could know what I used to have as flavor text here. ;)
Can't Access my Set    C    Well, that's not specifically true. For my Unplaced Cards set, I am unable to access to front page. This means I can't see any new comments on the set. I am, however, able to access the other pages, such as individual cards in the set and the visual spoiler. My other sets seem to be functioning fine.	Expand flip card text    C  Bug The expand button doesn't work on flip cards.	Move cards between cardsets    C  Feature It'd be nice if we could move cards between cardsets we own. At the moment you have to delete it from one and create it in the other, which loses the edit history and comments.	Auto-detect existing card names    C  Feature It'd be nice to automatically tell people when they're specifying a card name that's already been used by Wizards.	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?

Levelers (mythic)
Can't edit cards in Safiria (uncommon)
Frequent Heroku errors? (uncommon)
Different card frames (uncommon)
Per-user popups with prefs (common)
Split and Flip Cards (common)
Level-Up Cards (common)
Error page mouseover and centering (common)
Sort/show by Rarity buttons in Spoiler (common)
Card history (common)
Can't Access my Set (common)
Expand flip card text (common)
Move cards between cardsets (common)
Auto-detect existing card names (common)
Can't view large sets (basic)