Hi All! This is my first post.
First words: GLFW - awesome library! Keep up a good work!
To the problem. Now i'm using GLFW 3.0.4 on Xubuntu 13.10 64 bit with Nvidia GTX 560 Ti videocard.
For some time i've struggled with flickering when user resizes window. Searching through internet gives no results (my bad, maybe).
It seems that one of solutions is to comment out one string in the file x11_window.c: "// wamask |= CWBackPixel;" (Edit: before building library)
Flickering dissapears, but i fear that such a barbaric method could ruin something else in the library.
Please report this to the issue tracker. The setting of CWBackPixel is part of an old workaround that may no longer be needed.