Just read this over at macosxhints.com
NaOH-Lye over at macosxhints has an Applescript executable via keyboard (with a program like Butler or Keyboard Maestro) to reload Safari tabs a little faster…No, this isn’t earth shattering, but it does provide Script-junkies numberswiki.com
a little refresh love for Safari.
tell application "Safari" set sameURL to URL of tab 1 of front window set URL of tab 1 of front window to sameURL end tell
This works on Safari Beta 4 and Safari 3