I have been experiencing the same problem for the last couple of months (ever since I installed Opera Developer on my computer). Opening Gmail in Chrome does not exhibit the same issue. I'm currently running Opera 55.0.2962.0 .
Opera 53.0.2907.68 on Windows 7 32-bit, installed as 'Stand-alone installation (USB)', Language = English (United States):
If a region for a screenshot is larger than my computer's screen, so that I have to scroll for selecting that region, then Opera generates a truncated screenshot on my computer. Since my screen resolution is only 1024x600 (netbook), this happens nearly every time I am trying to take a full page screenshot.
I think that screenshot bug was also meant by 4channer here.
BTW, Firefox 60.x has an option to save a full page screenshot without any manually dragging/resizing which is very handy. Would be nice if Opera could support that feature too.
Some versions of Windows don't allow programs to set themselves as default - sometimes the installer can (since it does ask to modify your computer), but sometimes you have to go through Windows settings (control panel on older versions) to change it.
@burnout426 said in Opera Message: This site wants to download multiple times. Block? I clicked Yes and want to undo.:
After you turn that on and make your changes to the automatic downloads settings, turn that back off as it's not too stable in Opera 53. It works better in Opera 55.