I'm not exactly sure what's going on here, though I know it has something to do with dark oak logs. What I know is every time I load these chunks where I have some textureless dark oak logs I obtained via the meta value changer bug the server I play on crashes. Since I'm not 100% sure of what is actually happening I will attach a crash report to this bug report. To reproduce this bug, I'd assume you'd have to simply obtain a dark oak log with a damage value of 3 and place it. Though as I said previously I'm not exactly sure.
Environment
OS: Mac OS X (ver 10.7.5, arch x86_64)
Java: 1.6.0_65 (by Apple Inc.)
Launcher: Minecraft Launcher 1.4.4 (bootstrap 5)
Minecraft: 14w25b (updated Thu Jun 19 08:29:48 EDT 2014)
This is caused by the broken logs aquired in 14w25a due to MC-56893
Delete the world, it's broken.