When I try to update my signature with BBcode I get the following error message:
The following BBC is not allowed within your signature: abbr, acronym, anchor, b, bdo, black, blue, br, center, code, color, email, flash, font, ftp, glow, green, html, hr, i, img, iurl, left, li, list, ltr, me, move, nobbc, php, pre, quote, red, right, rtl, s, shadow, size, sub, sup, table, td, time, tr, tt, u, url, white.
Why is there a restriction on BBcode?