well numeric works. i have the '2c' be replaced with an icon for two cents..
why have to have + ? is it that necessary ?
I've had mixed results with numeric codes.
[1] by itself works, but [1_] doesn't, and I "need" both.
As for the plus sign, yes it's "necessary"
I run a fighting game website and we use graemlins for joystick and button inputs, and the plus sign is used to indicate simultaneous presses.
To date, we've just been using a plain text plus sign, but it looks funny amid the graemlin graphics
plus it's not fully compatible with our wiki markup code, which incidentally has no problems with numerics, underscores and special characters like plus signs.