Hitting 'Save' in EditForm opens PDF document

Question

I created a custom document library that stores scans of invoices as PDF-A documents. The library has a custom content type with some custom fields and the list's schema also links to a custom EditForm.aspx.
In the EditForm I am using a JavaScript function named PreSaveAction for some custom validation. The save button itself is not customized.
Now on some clients in the customer's network a weird effect occurs: Every time a user hits the save button of the EditForm, the browser redirects to the PDF's URL instead of the source URL, effectively opening the
PDF in the browser.
IE debugging doesn't lead to any errors. The last JS function called, before the PDF opens, is in line 2090 of SP.UI.Rte.debug.js:
RTE.Imports.ExecuteOrDelayUntilScriptLoaded(RTE.Canvas.$F1_0,"sp.ribbon.js")};
but that seems to be normal behaviour.
BTW, i am not opening the EditForm in a SP Dialog (NavigateForFormsPages="TRUE").
Has anyone ever encountered such an effect?

Answer 1

Hi,
sorry for the late reply. Actually the whole story was much easier than I thought it would be. The missing peace, that I've forgotten to mention, is that I created the Edit-Buttons via JavaScript and there I simply didn't supply a"Source" url parameter.
So appending the following to the anchors href value did the trick:
 + "&Source=" + window.location.href;
Interestingly the default behaviour in absence of that parameter seems to be to redirect to the file's url.
Btw, the initial reason to append the edit buttons manually was the fact that sharepoint does not render edit buttons if the user hasn't AddListItems and DeleteListItems permissions on the list. For all users, who had that permissions, everything worked
fine because in that case I didn't manually create the edit buttons.
If anyone knows a more elegant solution, than creating them via JavaScript, I would appreciate to hear from that.