DROID X v4.5.621.MB810 update now available, brings a slew of bug fixes

Droid X owners, the cure to those nasty, annoying bugs that your phone has been suffering from is here! Motorola is now rolling out update v4.5.621.MB810 to the DX. In the case you didn’t get the prompt for the update, you can manually check for it by going to Settings> About Phone> System Update. Here is the full changelog:

Over the Air Updates

• Prevents lockups or resets after the Over the Air (OTA) update.
• OTA update notice screen displays the correct estimated update time.

Device Features

• Improved browser security with the Google Security Patch from Android 2.3.6.
• Fixed issue where the device may power ON without user interaction.
• Resolved possible device resets while playing music.
• Adjusted camera settings will be saved, even after the device is powered down.
• Reduced Out of Memory errors.
• WAV files can be played from Visual Voice Mail.
• Device is enabled with the Wireless Alerting System.
• Improved stability of Music Player reduces resets.
• Shortcuts to applications remain on the device even after applications are moved to the SD card.

Email, Messaging & Data

• Improved connectivity with 3G Mobile Hotspot data connectivity.
• Addressed error that replicated thumbnails in message threads.
• Corrected errors where Yahoo! mail notifications were not displayed properly.
• Reduced duplicate message errors.
• Improved ability to access and receive Gmail when the Mobile Hotspot is turned on.
• Sorted contact groups.
• Device recognizes Multimedia ringtones after purchase.

Accessories

• Button background lighting turns off while in the desktop cradle.

According to many reports from Android Forums, this new .621 update breaks the ability to SBF your Droid X back to an earlier version. If you don’t mind being stuck using the new build, go ahead and install the update.