I just ran an upgrade to 1.4.5.8 and everything looks OK except I get an error "Setup was not able to create this file. You will need to copy the zp-core/zenphoto_cfg.txt file to zp-data/zenphoto.cfg.php then edit it as indicated in the file's comments." when trying to access the site. The message says the the file does not exist. It is there in zp-data and I can login to the database through putty using the same credentials without a problem. I checked the logs and in the debug log the only thing is that the install could not create the robots.txt file. I created it. The last entry in the setup log is that setup completed.
Any ideas on what to look for?