The message asking if you want to send an error report is from Windows.
It probably wasn't changing game resolutions that effected the screen focus. If you enable Caps Lock, or hold the Shift key down, you can move the screen focus away from the character, allowing you to see or toss things further. In this case, the screen focus may not follow the character when using stairs, etc, but disabling Caps Lock should re-centre the screen focus.
Did you install the
patch? Some of the versions of DD bundled with BD are already updated to the latest 1.0034A version, as shown in the bottom right corner of the main menu.
Check out the topic;
Troubleshooting Tips (& manual install procedure)