During installation jdk on jre of the same release reinstallation is offered but then "this action is only valid for products that are currently installed" message popups.
Steps to reproduce
2.Install JDK of the same release whithout unselecting the JRE in the install options dialog.
3.See "There is already a JRE of this version installed. Would you like to reinstall it?" and click "Yes"
As a result "This action is only valid for products that are currently installed" message popups. Only then expected initially instead of reinstallation offer message "You already have this version of the JRE installed. Please uninstall the product thruoght your add/remove utility before reinstalling" appears.
OS - Windows XP
JDK - 1.5.0_16-b01, 1.5.0_15-b03