What is a "Bootloader" ?

What is "stk500" ?

What is "avrdude" ?

What symptoms indicate a bootloading problem?

What are common causes of bootloading problems?

What information can I collect to debug a bootloading problem?

Can my Arduino have the bootloader damaged?

How can I tell if my bootloader is damaged?

Why else would I want to upload a new bootloader?

Can I replace or upload a new bootloader with no additional equipment?

How can I replace or upload a new bootloader?