The quest log says I haven't yet made Spriggaise, even though I have. Making it again doesn't seem to fix the issue:
Screenshots
cl.ly/a4c32d60fb335b38383f
cl.ly/ef62f091e2bd51948e22
cl.ly/d2a0132165d9eb411db4
Not sure my specs matter, but fwiw:
Mac 10.6.4
Chrome 5.0.375.99