DokuWiki on free.fr?

I try to set up DokuWiki on an account at the very popular french provider free.fr, but I get all kinds of errors.

free.fr cripples their PHP configuration beyond anything that can be supported by DokuWiki. DokuWiki will not run on free.fr (if it does for someone it's just pure luck). Please do not report any bugs regarding running DokuWiki on free.fr before making sure that they still exist when using a different provider.

Some people had success with changing parts of DokuWiki to work around some limitations of free.fr. More info about this can be found in these forum threads:

• Hébergement chez Free
• Fatal error mkdir(.../data/locks/...) ... File exists
• Patch pour free.fr