IDE file load/save dialog not appearing, blocking IDE

[GiorgioCC]

I ran into this malfunction with version 5.7.1, both portable and
installable, both with TDM-GCC and MinGW:

when a file dialog is opened for saving or loading anything in the IDE,
the dialog is not visible (sometimes it works, but more often it fails).
Since the file dialog is modal, the parent (main) IDE window can't be
operated in any way. Clicking on it only rings the familiar bell for
parents of modal dialogs.

There is no other solution than to close the IDE through the task
manager; even selecting "Close window" in the task bar does not work.

I also noticed that, in this situation, no Dev-Cpp miniature appears in
the open application list recalled through Alt-Tab.

I am using Win7 Ultimate 32bit, tested on both a single- and
dual-monitor configuration.

This malfunction is very frequent (happens about 90% of the times that a
file dialog is opened), so the IDE is effectively unusable.

Looking forward to any feedback about it.
Thanks for your efforts.

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[Matthew MacGregor]

Hey, Georgio. I tried reproducing this issue but I've been unable to reproduce on my setup. You're seeing the issue on both single and dual monitors?

[Matthew MacGregor]

I've been testing on a dual-monitor setup. I notice the following behavior that may be related:

Windows Common Controls (Open, Save) will open on my primary monitor.
Custom Dialogs (Project Settings, Compiler Options) open on the active monitor (where Dev-C++ is located).

It seems plausible that this is related to the problem you're seeing. My hunch is that windows system dialogs are somehow displaying offscreen in your case. I've still been unable to reproduce anything like this on a single-monitor setup.