July, Sept, and November 2008 Hotfixes had an issue with security. Only Sysadmin was allowed to change dates on Documents, regardless of SecAdmin Settings.
RTI has fixed this and I have updated the July, Sept, and November 2008 Hotfixes on T:VERSIONS8_SERIESCurrent Hotfixes8.52
If you find a client having this problem, drop in the new RPRO8.SEC (found on root of FTP Server and T drive) into their RPRO folder, and then update this file in SecAdmin.
RPRO > Retail Pro V.8> System > “access modification of document dates” needs to be checked.