This is a list of bugs and known problems:
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- IGL is by no means multi-threaded. it wasn't meant to be and it probably never will be
- one word: flickering
- window sizing is sometimes incorrect
- a lot of APIs still not supported/implemented
- QFULL event is not triggered when device queue is full
- getgdesc() needs a window to function properly
- IrisGL default settings for buffers, colors etc. should be set correctly
  on Win32 and X11 platforms. (/me should study the man pages some more)
- menus: if a menu has a submenu and no IDs were user-specified, both of the menus have
  same IDs and therefore clicking on a submenu item causes top-level menu command to execute.
  note that i have yet to find out whether this is a bug or not...