I think it might be at line 5034
client-log.txt
And it said this in chat when I opened a world:
"OpenComputers: An addon (yours?) using the SimpleComponent interface did something wrong. Component logic could not be injected. Please check your log file for more information."

I've been doing some more testing. I think this might actually be a problem with Random-Things.
EDIT: Yep, It's a problem with Random-Things...