So, I have been using a SSP world for a few months now. Just today, I built a Reactor, to give power to my ME Network. I then created a new testing world, to test stuff in, and built a reactor to power another ME Network, that I was experimenting with. I then had to do something else in the real world, and quit the game. When I came back to test more, the game crashed when loading the world.
I read the crash log, and found some issue, that compelled me to open my SSP world. It caused a crash too, when loading, most likely due to a bug with this mod.
Here is the first crash log:
http://textuploader.com/1dpu

EDIT: I installed the latest unstable version and tried that. It fixes the first issue, bur causes another one. Here is the new crash report:
http://textuploader.com/1d2o
Thank you for viewing this issue, and I hope it gets fixed soon.

Hello,

Prior to 0.2.10, Big Reactors has a known incompatibility with Optifine. This should be resolved in the experimental 0.2.10 releases; however, they're not yet 100% stable.

If you don't mind backing up your world, you could update to 0.2.10X1 and see if this crash occurs again.

Thank you. That does fix that issue, but there seems to be another problem keeping me from loading the world. It is a crash, but a different kind. See the crash report, please: http://textuploader.com/1d2o

Thanks for checking; I'm away cor a few days, so I'd suggest downgrading to
0.2.9A3 and disabling optifine until I can fix that crash in 0.2.10X2.
On Dec 23, 2013 7:54 PM, "SegFault22" [email protected] wrote:

Thank you. That does fix that issue, but there seems to be another problem
keeping me from loading the world. It is a crash, but a different kind. See
the crash report, please: http://textuploader.com/1d2o

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Reply to this email directly or view it on GitHubhttps://github.com//issues/70#issuecomment-31136934
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Thank you for the quick reply. I will try to downgrade and disable Optifine. My framerate will become lower than the bedrock at the bottom of the Nether, but atleast it's something.