I have a couple of problems with the user interface of the Linux version of Mathematica.
1. When I use delete or backspace, a small box character appears, rather than anything being deleted. (My keyboard is a UK layout - don't know if that makes any difference.)
2. My mouse cursor is a hand, rather than a text selector - i.e. dragging over text pans the viewing window, rather than selecting the text.
Has anyone had a similar problem to either of these? How can I fix them?