I just copied the urls from your post, hoot, and tossed them into the address-bar of a new window and they popped open no worries.
...and the address-bar dropped the jpeg file extension altogether!

If you put ...//imgur.com/XqSxwDB.jpg instead of ....jpeg in the web-address between the [img]s, it will display here in the thread, but bloody HUGE!!

Like this:

Easier as John says, to just post the link to be clicked on to open in a new window.