Not daft at all, it took me forever to find an older version as well. There is suppose to be a “Other Versions” button somewhere on the download page but I couldn’t fit it. I did figure out what the URL should be though:
http://wordpress.org/plugins/advanced-custom-fields/download/
4.3.2 is working with Wp 3.8 for me.
I downgraded to 4.3.2 and I’m back up and running now.
Same issue here. My site is http://austinsimplyfit.com – just updated to 4.3.3 because I updated wordpress to 3.8 – now Pages will not show in my link options.