5. I am a newbie on Linux, but I already find a few bugs. For example, in gnome-termial, if I set DEL to ASCII DEL in the profile settings, it actualy acts like BACKSPACE. This bug may be specific only to gnome, but since it's bundled with FC3, so I attribute the problem to FC3. It's quite reasonable.
Never had such problem with any version of linux i tried. Either stop tweaking options you don't understand or (again) it is an emulator that needs tweaking. BTW, in my terminal, backspace is configured to generate ASCII DEL, and del to escape sequence and I never changed this. So, you probably just configured del to be a backspace.
What do you define the word 'bug' in software world? In my dictionary, bug at least means one thing - it does not work as it should to work. Your above comment is like saying - that DEL option is the ears of a deaf, don't use it!
Where is the bug here? You configure DEL to be BACKSPACE and complain that it generates BACKSPACE. Change your setting to default and it will work as you expect it to work. This option is probably for compatibility with some terminals, where DEL works as backspace. If you don't want it to act that way, don't configure it so.
