conflicting libpng versions

[pixie666]

I installed vdrift under Slackware 13.1 / 2.6.33.4-smp. The install worked fine, but when I try to start the game I get this error message:

INFO: Your video card doesn't support framebuffer objects. Disabling shaders.
libpng warning: Application was compiled with png.h from libpng-1.4.2
libpng warning: Application is running with png.c from libpng-1.2.43
libpng error: Incompatible libpng version in application and library
ERROR: Error loading texture file: /usr/local/share/games/vdrift/data/textures/weather/cubereflection-nosun.png

I don' t really know how to sort this out. I could off course uninstall libpng-1.4.2 and then reinstall vdrift, but I guess that messes up things.
Could I force vdrift to use its own libpng version during install, or force it to use it when in starts up??

Thanks in advance for any help

regards

Emile