Can any one explain me abt the significance of the symbol "+" next to permissions in the below file

#ls -ltr temp1
-rw-r--r--+ 1 sharif staff 4081304 Jan 17 10:57 temp1

its there only for few files.. if u see the below case its not there

-rwxrwxr-x 1 sharif staff 30406012 Jun 30 2006 temp2

Any specific reasons???

Cheers,
Sharif.S