That's odd, whenever I tested site before when changing page size it worked fine, though if you make site fullscreen, it resizes to bigger images, which is probably the only resizing people are going to do whilst actively viewing. Though I do make some web pages smaller to improve readability of text [like on LuLa's old design and current forum design], as fluid width sites with no size restrictions make for difficult reading of text.
I have to say, I hate the front page element of my site when it's does the HTML thang on the phone and is partly why I'm looking for a better way of doing my site.
Thinking about it, with high res screens you get on phones now, they are liable to be quite large images. I know the images I do for portfolios on my phone/tablet are probably the same size as my desktop monitor at 1:1.
Well if you disable flash, then you're going to get a lot of blank pages on many photographer's sites. Flash is a really useful design tool, but because of Job's irrational hatred of it it been sidelined in favour of HTML despite the fact that HTML is way inferior to Flash for some task/reasons so a huge step backwards for the web killing it off. Though because Flash allowed people to sideline Apple's gated money pit that meant it would have been shut out anyway. Safari runs Flash really, really badly, but then it's a crap browser anyway so that's not surprising.
In fact what I'm looking for is a site with functionality something like yours. I recall looking at it a while back and admiring the [nice big] photos.