Of course it's not a solution for all cases, but your error is probably caused by suExec or suPHP... Maybe you could disable it or use something else ?
I know it sounds crazy, but I do have a reason for doing this. I would like someone else on the same file system to be able to make changes to files, and unfortunately I can not change the group we are involved in. Is there a way to suppress this error message? I have a feeling it can achieved using some directive in a .htaccess file, but that is simply a whim and I could be completely wrong.
Of course it's not a solution for all cases, but your error is probably caused by suExec or suPHP... Maybe you could disable it or use something else ?
You are correct it seems to be caused by suPHP. Can I disable it at a user level, or is this some change that would have to be made in the global config file?
You have
allow_file_others_writeablein the main config ( suphp.org/DocumentationView.html?file=CONFIG ) . Don't think there's any config you can do at a lower level, but I might be wrong.