Thanks for the useful links. I ended up re-flashing the stock 4.22 image using that procedure. Then the OTA update to 4.3 worked fine.

Thanks for the quick response. This doesn't make sense, though, because when I use the picasa program to upload the photos are not resized (so it has nothing to do with the 1GB limit). It's only when I upload from my phone that I get trimmed to 2048 pixels. I'm not uploading via google+ so I wouldn't think that rule would apply.