Chas
I meant no insult by my comment, that is homer simpson's utterance of choice when he realizes he has made a simple mistake, not to be confused with the "duh" usually associated with a situation of insinuated ignorance. Please pardon any discomfort caused by this confusion.
Actally your tartan appears more likely to be ancient macdonald rather than modern macdonald, which could explain your difficulty in recognition due to the different color palate, an understandible error.
Please pardon any discomfort I may have caused.

Jeff