My device is made in Hong Kong, so the problem indeed may be hardware-related...

Another question then - when overclocked to 900MHz on ulv profile, a couple times mplayer closed itself. Not a single stability problem otherwise. When overclocked to 900MHz on lv profile, there was no such thing. Do I get it right that this might be overclocked DSP-related issue, and I should add more voltage or reduce DSP frequency of some entries in ulv profile, or it still could be main CPU stability issue?