Updated Readme

README.md

 
 *Warning:* Java3D 1.5 is incompatible with more recent OS X versions and/or Java 7. [Possible workaround](https://github.com/hharrison/).
 
+Also the Windows build of CubeControl is not tested very thoroughly. If you're on a 64bit Windows, you may also need to modify the libSerial makefile (add the `-m64` flag in the gcc call).
+
 ### HardwareEmulator
 
 Allows you to test CubeControls up-/download capabilites. Unix only!
 
 ## License
 
-See the included LICENSE file. This software is released as GPLv3. It incorporates some code from Peter Danneger (a [button debounce routine](http://www.mikrocontroller.net/articles/Entprellung#Debounce-Makro_von_Peter_Dannegger)) and Peter Fleury ([TWI Library](http://homepage.hispeed.ch/peterfleury/avr-software.html)).
+See the included LICENSE file. This software is released as GPLv3. It incorporates some code from Peter Danneger (a [button debounce routine](http://www.mikrocontroller.net/articles/Entprellung#Debounce-Makro_von_Peter_Dannegger)) and Peter Fleury ([TWI Library](http://homepage.hispeed.ch/peterfleury/avr-software.html)).