The soulmeld blink shirt says that the meldshaper gains
the ability to teleport (as dimension door) up to 10 feet at will. Using this ability is a standard action. After using this ability, you can’t take any other actions until your next turn. You cannot bring along other creatures; you affect only yourself. (Magic of Incarnum 61)
When a meldshaper uses the ability to teleport gained from the blink shirt, does the meldshaper provoke attacks of opportunity, as if casting a spell or using a spell-like ability; or does the meldshaper not provoke attacks of opportunity, as if using an extraordinary, natural, or supernatural ability?
Because the text doesn't categorize this ability as extraordinary, spell-like, or supernatural, by default the special ability is natural, but it just feels wrong to categorize as natural a special ability gained from a shirt woven of preincarnate souls.