I'll update the script, and make sure old format still work.
[deck mark=MARK author=AUTHOR]...[/deck]
will still work, but the mark will be optional.
The mark code, if present, will have priority over the tag mark.
Don't modify your decks unless you don't mind having a black card until this is fixed.
We love you Planplan
Oh yes we do
We love you Planplan
And will be true
When you're not coding
We're blue
Oh, Planplan, we love you