I was compiling POWDER for PSP again based on the files provided on its latest build, with current toolchain from pspdev's page and with pspdev sdl 1.2.15-5 [installed] latest sdl.

For some reason, the timer thread doesnt do anything, yet the game works fine on Linux SDL with almost no changes, so the Callback function (or the thread) might be not getting called.

I might update this once I test the threads issue more deeply, maybe with a simpler app.