Hi Can any one help me on this, I have created validtion rule which avoids the special characters except comma(,) fullstop(.) space( ), but i need to accept Enter key also(when i use enter key am getting error like please avoid special characters , even though am using enter key am not supposed to get this error). 

THis is my validation rule am using  NOT(REGEX( Description,"^[a-z A-Z 0-9,.]*$" ))