[Sun Mar 27 17:18:49 2011] [error] [client 126.96.36.199] ModSecurity: Input filter: Failed to rename file from "/tmp/20110327-171847-4yuNZ0rQxvYAAFA4TxIAAAAG-file-aBzInB" to "/var/asl/data/suspicious/20110327-171847-4yuNZ0rQxvYAAFA4TxIAAAAG-file-aBzInB". [hostname "xxxxxxxxxxxxx"] [uri "/index.php"] [unique_id "4yuNZ0rQxvYAAFA4TxIAAAAG"]
Not a false positive, an actual error on your system. Check to see if you have MODSEC_KEEPFILES set to "on" in ASL, if yo do, set that to off.
As an aside, its a bad idea to set it to on anyway, the bad stuff gets uploaded to the server, so generally only a good idea to turn this on if you are debugging something (and we are going to remove this option in a future version of ASL). This can happen with odd non-standard permissions issues, mount changes to /tmp (no exec for example), etc.
Apache-Error: [file "/builddir/build/BUILD/httpd-2.2.3/modules/generators/mod_autoindex.c"] [line 2274] [level 3] Directory index forbidden by Options directive: /var/www/vhosts/premierhosting.com/projects/
Stopwatch: 1301264021830503 14518 (2031 9786 -)
WAF: ModSecurity for Apache/2.5.13 (http://www.modsecurity.org/
Also not a false positive, and not generated by ASL. ASL is just reporting that apache is reporting an error, specifically, as above:
Directory index forbidden by Options directive: /var/www/vhosts/premierhosting.com/projects/
You have your server configured (correctly IMHO) to not allow index access to /projects/. This is not something ASL controls, and is something you configure in Apache, htaccess, etc.