Windows 3.1 build 038

Windows 3.1.038 is mentioned in an internal Microsoft e-mail from early July 1991. The e-mail discusses issues with Microsoft Flight Simulator 4.0 running on this build of Windows 3.1.

Specifically, the e-mail mentions Flight Simulator being slow and experiencing color mapping issues on this build, as well as a rare bug which causes massive screen draw problems. It is also said scrolling is smoother when Flight Simulator is running in a DOS box on OS/2.