I need to sort the buttons, you are right, I only really noticed it when looking through manually. I'm using an autosize function on the backend and think I'll just size them all up this end first - which should sort that. You'll notice that 'Chalk' works fine, as they are all presized at 600x600px.
Won't get fixed until 2014 I'm afraid as the kids are off, so the computer is hogged! Concentrating on getting some larger platinum works finished.
Re - the galleries and slideshow. I'm not sure if I'm the only one that gets it, but its supposed to be more of an experience, a show, an album in the musical sense. I'm forcing you to look at each image (although you can over-ride it with the buttons), to listen to each track.
I used to have the site with thumbnails and click-throughs, but changed it for this format. I like photo-books, settling in a chair, quiet part of the house, maybe glass of wine and thumbing through - a leisurely experience. Thumbs aren't the best way to view my images, so I decided not to have that as an option. I'm not under the illusion that this site is a springboard to loads of print sales, it's more a holding place for people to see what I do.
Thanks everyone for the comments and constructive remarks, very useful.