Since November, I have had this weird and trippy graphic bug where an inch of the surrounding desktop for the main launcher window gets attached to it like a border. It also causes the drop shadow my desktop environment adds to every window to become really thick and dark for just the main launcher window.

Screenshot included as an attachment, there are no errors from minecraft-launcher in a terminal and this error does not extend to Minecraft or any other child windows the launcher uses such as the log output window.

In case you were going to ask me: yes, this also happens in the beta version, I just chose the stable version Because it is what I had installed at the time of this bug report.