Font size 72 causes app crash - Alignment trap

Hi, i'm developping in Qt 4.7.4 Embedded in Ubuntu 12.04 over an x86 PC, but cross-compiling for an ARM target with a custom embedded linux.

I was making a form in the Designer, and i added a button with some text and set the font to "Sans Serif 72". The compilation was successfull, but when i run it in the arm target it crashed while trying to show the window (dialog.ecex() or dialog.show()).

Trap:
Alignment trap: commserver (11124) PC=0x4c2ecb48 Instr=0xececa102 Address=0xbefcacf4 FSR 0x813
Alignment trap: not handling instruction ececa102 at [<4c2ecb48>]
Unhandled fault: alignment exception (0x813) at 0xbefcacf4

Solution: Setting the font size to 48.