Oops, I seem to have missed that call to file_get_contents() when rewriting the tool to be cURL compatible.
What I did (for those people without curl support compiled into their php binary) was exchanging the calls to fopen with a process pointer to the commandline cURL tool. I will try to do this for file_get_contents, too. Is there anyone with fopen_wrappers problems who would like to test the fixed version before it is published?
