Ok.. a friend's phone with more free root space (55meg ish) couldn't upgrade.. said he needed to use usb/pc

Freeing space not the issue as I had far less

however, some magic depedency tracking scripts revealed:

gltron requires libgles1
libgles1 requires libgles1-sgx-img
libgles1-sgx-img requires opengles-sgx-img-common SPECIFIC VERSION: 0.20091104.6.1+0m5

That version of opengles-sgx-img-common is not in PR1.2.. a later version is.. so removing gltron and its depedencies let my colleague install (except his battery is now too low!)

It seems it freed up that dependency on libgles1-sgx-img which would've been broken after the PR1.2 update..

So.. if you have GLtron installed.. scrub it off.. and maybe reinstall afterwards..