these are the fixes/ improvements claimed by motorola for 4.5.608 from 2.4.330
from Verizonhttp://support.verizonwireless.com/system_update/droid_2_global.html site
Enhancements:
+ Download Manager App:
New App to manage all of your downloads from web browsing,
email attachments and other apps.
+ App and Power Management Details:
Under Manage Applications, a new “Running” tab displays a list of active
applications and the storage and memory being used by each.
+ Multi-Touch Key-Chording:
New ability to enter numbers and symbols with keyboard shortcut combos,
instead of having to change to the numeric keyboard mode.
+ Improved Word Selection and Copy Functionality:
New capability to select a word via press-hold. A second press of
the selected word copies the selected characters.
+ New User Interface and Color Scheme:
New widgets, icons and screens with refreshed colors.
+ Dock Icons:
Static Phone, App Launcher and Contacts icons are replaced within a
customizable dock. Three swappable icons and the App Launcher icon
are fixed to the Dock at the bottom of all home screen panels for easy
and instant access.
+ App Groups:
New App Menu allows creation of custom app groups, in addition to 3
default groups: All Apps, Recent and Downloaded.
+ Security:
Added Device and SD Card encryption. VPN enhancements integrate
IPSec VPN clients into device security settings.
+ Updated Calendar Options:
• Display Calendar and event times in your home time zone when traveling.
• Dismiss individual reminders, such as dismissing one meeting reminder
without dismissing other meeting reminders.
• Easy conference dialing – simply dial and automatically enter a
conference code directly from your Calendar.
Additional Improvements:
Email and Messaging
+ Sporadic issues with unintended recipient list corrected for text, picture, video and audio multimedia messages.
+ Exchange ActiveSync calendar events created on the device will now push to your PC calendar.
+ POP3/IMAP emails now show the correct date stamp.
New ActiveSync Email Policy Support for the following:
+ Data encryption for both the internal and SD card memory.
+ Require manual synchronization while roaming.
+ Allow HTML email.
Additional Device Features
+ Improvements in stability prevent lockups, resets and force close errors.
+ Bluetooth® devices will now select the correct audio recording level for optimal voice capture and alert you when your audio level is too low.
+ Improved battery life while using Bluetooth.
+ Access My Verizon without any force close errors.
+ Reset Backup Assistant under Manage Applications menu.
+ Enhanced connectivity when roaming in GSM/UMTS networks
(Europe and India).
+ Improved battery life during Wi-Fi use.