2 screens open at the same time - checksum error when saving 1st screen

I have a problem with one of my applications (built in HTML DB v1.6)
In the application, there's an overview of the records, with a link to a detail-screen which has all the fields of the record are displayed (so basically what you get when you choose "Form on a Table with Report, 2 Pages" when you create a new page). This detail-screen opens in a new window, because the overview takes quite a while to load. So instead of going to a detail-screen and then going back to the overview, the detail screen opens in a new window, the user updates it, and then closes the window after saving.
Now here's the problem: when you open a detail-screen for one record, and then open another detail-screen for a different record, an error occurs when you try to save the record from the first screen you opened: "Current version of data in database has changed since user initiated the update process. Current checksum = ...., application checksum = .....".
The thing is, the 2nd detail-screen you open can be saved without any problems. I guess this is because the checksum in the session is the one from the 2nd screen, so the one from the 1st screen is obviously a mismatch to the one in the session. If I'm wrong about this, please let me know.
But now the question: is there any way to fix this, that it is possible to open multiple screens, and still be able to save them ?

hi Scott
application id: 34977 (named Asterix 2.1)
workspace: Athylon
instructions:
-Log in with test/test (not for the workspace, but for the application)
-Then you'll get the main report (page 30 in the app), where at first you won't see data, just a few fields you can fill in. You don't need to fill in anything, though.
-Press "Zoeken" (dutch for "search"), and you will get some data. You dont need to fill in any of the fields above the report.
-Now it should show 2 lines, with different values for column POD.
-If you click the number under column POD, it will open the details of the line in a new window (page 31 in the app). Click the first record, so that will show the details. don't close the window, but go back to the original window and open the details for the 2nd line. You should now have 3 windows: the report, and two screens with the details for both lines.
-now go to the screen which has the details for the record you first opened. Change a field, for example "Comments" (it has some numbers in it, or "some comments" as text). It doesn't really matter what you enter here.
-Click the button "Opslaan" ("save" in dutch) in the top right corner. Now you should get the error that the checksum is incorrect (and in dutch that it can't save the record).
I hope you can identify the cause of this error, because I could not reproduce this in a new application, and I don't see why this error occurs. Not a lot happens when the record is being loaded.
thanks in advance for your time,
Tonnie
Message was edited by:
tonnie

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