[quote=“kickingjamie, post:20, topic:542858”][quote author=zuppers link=topic=661733.msg4428116#msg4428116 date=1401821289]
I use OptiFine_1.6.4_HD_U_D1 with no problems, so I don’t think that’s the issue.
@Agl - Try a fresh install of everything - so delete the whole mod pack and reload it.[/quote]
zuppers’ idea worked