Updated for KSP 0.90!
Corrects a known problem with KSP drag by preventing resource mass from being used in drag force calculations. Does not attempt to implement realistic drag nor replace stock aerodynamics. With this plugin, vessels will no longer have excessive amounts of drag applied against them. When used with Real Solar System, rockets no longer require unrealistic amounts of Delta V.
Other stock gaming components (such as SAS) will not be impaired.
MechJeb2 is unimpaired by this plugin and can successfully fly a rocket to orbit with no problem. Reentry predictions should work properly too.
Directions: Unzip contents into your KSP folder, merging with GameData folder.
Discuss the mod here: http://forum.kerbalspaceprogram.com/threads/84978-0-23-5-Stock-Drag-Fix