I am using xfce4-terminal via Cygwin/X. When I open a file in VIM and press Shift-A (to get to the end of the line and enter insert mode), some strange character is displayed at the start of the line.
In the image below I am on the last line of the file, then I press Shift-A. The green cursor moves to the right side of the line, but at the previous cursor position there are some strange characters.
I’ve tried a different font for xfce4-terminal. This problem is not present when using cygwin’s default terminal (the non-X based one).