A recent investigation on the eLua-dev mailing list revealed the fact that the AVR32 firmware files in the eLua 0.9 release package were compiled with a faulty version of the AVR32 GCC compiler, which lead to runtime inconsistencies. The firmware was recompiled and the firmware files were updated. AVR32 users are advised to use a recent toolchain version (the current working release uses toolchain version 3.4.2). Check this page for more information on how to install/update your AVR32 toolchain.