Five points to anyone who can notice the difference.
Nintendo has launched a system update for the Nintendo 3DS which updates the system to firmware 2.1.0-4. While it is not immediately known what impact the software update will have, Nintendo states that the update was to improve system stability and that the udpate contained minor adjustments to enhance the overall user experience.
A closer examination of the firmware reveals that the Internet Browser has undergone a slight upgrade from version 1.7412 to 1.7455, and that additional content was added to the 3DS Sounds StreetPass data in the form of new colors.
Although most firmware updates from Nintendo are specifically released to block attempts to modify the hardware or system software, this newest update does not contain any such functionality except a warning in the update text:
Your Nintendo 3DS system and software are not designed for use with any unauthorized device and/or any unauthorized software. Please note that the Nintendo warranties do not cover any defects to or defects caused by unauthorized devices, software, modifications and/or non-licensed accessories.
Furthermore such use may lead to injury to yourself or others and may cause performance issues and/or damage to your Nintendo 3DS system and related services. Nintendo (as well as Nintendo licensees or distributors) is not responsible for any damage or loss caused by the use of such devices, software, modifications or non-licensed accessories.
IMPORTANT: After the Nintendo 3DS system is updated, any existing or future unauthorized technical modification of the hardware or software of your Nintendo 3DS system, or the use of an unauthorized device in connection with your system, may render the system permanently unplayable. Content deriving from the unauthorized modification of the hardware or software of your Nintendo 3DS system may be removed. Failure to accept the update may render games unplayable.