Upgraded the site’s PHP version to 5.2.12 and everything works OK.
Thanks again!
I forgot to say that the same thing happens with wordpress 2.8.5
No plugins installed… It’s a new site. Installed wordpress, upgraded to 2.9.1 and installed chameleon… Even with reinstall, I get the blank page.
(I also tried version 2.1 in another site with version 1.5. After the upgrade, same thing… only blank screen)