photas

My ground is dark too, toggling sm3 shaders doesn't do anything. Also, the sky/atmosphere is white instead of blue.

Install some mods. Mods are awesome. Some good ones are: interstellar, b9 aerospace, novapunch, KW-Rocketry, Kethane, Kerbal Atachement System, etc. Of course they can add more lagg, but there are mods for that as well: http://forum.kerbalspaceprogram.com/threads/59005-0-23-5-Release-3-1-Active-Texture-Management-Save-RAM-without-reduction-packs! You ca also just stop playing for a month or two and wait for some new updates to come out. But remember: once a kerbonaut, allways a kerbonaut!

@photas: What are you reentering with? A payload chock-full of fuel, or a standard command pod? The density of the vehicle matters a lot. Also, what mod you're using matters since they might not be set up for compatibility properly. I was deorbiting a satellite, way less mass than the standard command pod. I also checked if the standard command pod would act different, but it too would just keep accellerating. I am using a LOT of mods, so it's probably one of them that's uncompatible with Ferram Aerospace. Some of them are not updated for 0.23.5, so maybe when all of them are updated, the problem goes away.

I experienced something similar. I am using a lot of mods, including DR. When i launch, everything is normal (i do however also experience my rockets flipping around sometimes), but when is reënter kerbins atmosphere, it seems like there is no atmosphere at all. It just keeps accellerating untill i hit the ground of burn up. I realy hope someone can tell me if there is a fix for this, of if i have to change some settings. Thanks in advance