It works fine in Firefox but is messed up in IE and Safari. I've had this issue in the past. The problem is usually that one of the two instances of wmode is missing, both are necessary for the flash to interact properly with other elements (usually drop-down navigation).
It looks like your code is missing ,'wmode','transparent' at the end of the script that comes before that code (it is usually automatically inserted after the file url).
I've just inserted the wmode value in the script below.
AC_FL_RunContent( 'codebase','http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=9,0,28,0','width','768','height','300','src','slideshow2','quality','high','pluginspage','http://www.adobe.com/shockwave/download/download.cgi?P1_Prod_Version=ShockwaveFlash','movie','slideshow2','wmode','transparent' ); //end AC code