Fresh install error : Graphics support [configuration error]

flu

Hi,
I've just installed the last nightly (1.2.4 - release 3768) and I get this message at the setup :
`
Graphics support [configuration error]
Error !
No Zenphoto image handling library was loaded. Check your install files.
`
so I re-uploaded the zp files but I still get this error.

Besides, my php infos says that GD Support is enabled (bundled 2.0.34 compatible) .

Do you know what could be the cause of this error ?

Thank you for your time

flu

...then I used the last official release Zenphoto version 1.2.4 [3716] and I did'nt get this error.

Surprising, isn't it ?