I am running forge 9.11.1.965 on 1.6.4. Pretty much all the mods are updated to the latest 1.6.4 version and I'm barely getting any "This item will NOT survive a 1.7 upgrade". The thing is, i don't have some mods on 1.7 instance that i have on 1.6.4 (such as gregtech, ars magica, minechem, and dartcraft). Should I remove them on 1.6.4, run a 1.6.4 instance without them and then try updating? Maybe that's causing it?
I'm sure it's not bibliocraft. I removed it on 1.7 and the fancy lamps get replaced with steam. All the mod stuff is fine, even TC pickaxes and focus pouches in my inventory.
my 1.6.4 log (If you need it)
https://gist.github.com/anonymous/c0ae0971a5213a6ed817