I found a setting in Adobe Reader (v7) that forces all PDF's called from a browser to open in a new window. Here is how to make this setting:
- Open the Adobe Reader from the Windows Start button.
- Select Edit / Preferences and then select Internet under the Categories column.
- See the top most box "Display PDF in Browser" - make sure that box is unchecked.
- Click OK (it will take a minute to update)Try your reports again, they should open in a new window always.
The only real problem with this solution is that each individual user has to make this setting on their client machine, and you cannot effectively control this.