TBGL Viewport / TBGL_PARAM_PIXELS
TBGL_Viewport could behave oddly in some situations when used in TBGL_PARAM_PIXELS mode
I discovered issue in TBGL_Viewport when using TBGL_PARAM_PIXELS mode.
It occurs, if you use this exclusively and do not use TBGL_Viewport for fullscreen overlay in the meantime.
Problem has been fixed and will be present in next release.
Petr