I used the one click install for Concrete5 at my site www.alloneplace.net.
I filled out
Name Your Site: All One Place
MySQL Username alloneplacenet3
Database Name alloneplace_net_3 (I pasted the wroing value here in the forum post at first.)
This produces "Unable to connect to database."
On the left there's a yellow triangular warning sign following
Testing Optional Items
Version Comparison Available
The error message is "You must chmod 755 concrete/libraries/3rdparty/htmldiff.py and disable PHP safe mode."
I ran Filezilla and the permissions on the directory are 755. I read somewhere in the forums that PHP is in safe mode already.
I've seen several posts in the forums about this error message but I haven't seen the solution to the problem in any of them.