Hi. I am currently using Netscape 4.75 on Debian Potato.
Since I have been using Netscape, including previous versions of NS and Debian distributions, I have found that when entering information in an input form, and use the popup list menu to select an option, I can no longer enter keyboard input anywhere in the Netscape window. This only occurs after selecting "more..." and after entering multiple submenus. Mouse selections, radio buttons, etc work fine but it becomes unusable for keyboard input. It will only consistently return to normal after restarting Netscape. Although this is probably not Debian specific I wonder if any one has discovered a fix or workaround. Terry.