GPU-Z 0.2.3

* Fixed NVIDIA GeForce GTX 260/280 (GT200) support. Everything is working and tested now
* Removed bogus 190°C PCB temp sensor on various NVIDIA cards
* Added fan speed monitoring for NVIDIA
* Fixed crash when switching devices during sensor refresh
* Fixed ROP/Shader count on NVIDIA G72
* Fixed graphs spilling over their client area
* Fixed a number of other rare crashes
* NVIDIA device ID 0x00F3 now correctly recognized as NV43
* Improved crash reporting module