Weird glGetError 1286

[User137]

I have Intel CPU and AMD video card Raden HD 5700.

The files are all available there, from SVN trunk:
http://code.google.com/p/nxpascal/so...%2Ftrunk%2Fsrc
Or now already bit outdated zip files of source and demos.

Window is created in nxGL.pas at line 606, and with fpc it uses TOpenGLContext, and functions from dglOpenGL. I get same error with Delphi 7 too though, which uses only dglOpenGL. (In both cases on a TForm)
http://code.google.com/p/nxpascal/so...k/src/nxGL.pas

Also, the demo is doing the glDrawElements() while compiling a displaylist only, so it shouldn't actually be doing anything to framebuffer.