Here's what I'm seeing logged. (Newlines added to make it easier to see the log line boundaries with wrapping.) It looks like it's failing to traverse the root directory to get to the directory with the content in it, but why doesn't it fail on /var/www/html or home directory content, which must also do that?
type=AVC msg=audit(1228142052.656:3183659): avc: denied { search } for pid=29382 comm="httpd" name="/" dev=cciss/c0d2p1 ino=2 scontext=user_u:system_r:httpd_t:s0 tcontext=system_u:object_r:file_t:s0 tclass=dir
type=SYSCALL msg=audit(1228142052.656:3183659): arch=40000003 syscall=195 success=no exit=-13 a0=d75a6f0 a1=bfa4aadc a2=5ccff4 a3=8170 items=0 ppid=24589 pid=29382 auid=555 uid=48 gid=48 euid=48 suid=48 fsuid=48 egid=48 sgid=48 fsgid=48 tty=(none) comm="httpd" exe="/usr/sbin/httpd" subj=user_u:system_r:httpd_t:s0 key=(null)
type=AVC msg=audit(1228142052.657:3183660): avc: denied { getattr } for pid=29382 comm="httpd" name="/" dev=cciss/c0d2p1 ino=2 scontext=user_u:system_r:httpd_t:s0 tcontext=system_u:object_r:file_t:s0 tclass=dir
type=SYSCALL msg=audit(1228142052.657:3183660): arch=40000003 syscall=196 success=no exit=-13 a0=d75a768 a1=bfa4aadc a2=5ccff4 a3=2008171 items=0 ppid=24589 pid=29382 auid=555 uid=48 gid=48 euid=48 suid=48 fsuid=48 egid=48 sgid=48 fsgid=48 tty=(none) comm="httpd" exe="/usr/sbin/httpd" subj=user_u:system_r:httpd_t:s0 key=(null)
type=AVC_PATH msg=audit(1228142052.657:3183660): path="/mnt/bigdisk2"