(as usual, these are not written by me)

v1.53

New plugin framework. Similar to scripts but you code it in your favorite java IDE and plug the jar files into the client's /plugins/ directory. An example Eclipse (www.eclipse.org) plugin project is available (check www.bat.org site for more info).
CTLR+Z is now used to save action buttons. CTRL+ENTER was previously used but is since v1.5 default assigned to commandline focus keys.
The commandline history now only saves commands with 3 or more characters.
The commandline history now does not wrap the history with up and down arrows. When you come to the top or bottom it now stops.
The bug introduced in v1.5 that caused all beanshell created triggers to malfunction should now be fixed.
The quit dialog now got new graphics and randomized "bubble" messages.
The quit dialog will now automatically close itself when it looses focus in the client desktop.
The keybinding frame and the keybind input dialogs now have new graphics.
The keybinding keyinput dialog will now close itself if focus is given to another frame.
CTRL+SHIFT+ENTER will now add a new line in the commandline instead of just SHIFT+ENTER.
The realm map and all help frames now use a "standard" UI for their frames with options to minimize and close.
The status monitor now got close and minimize buttons.
The map and battle frames can now be minimized through the right-click popup menu on their text panels.
The keybinding frame can now be minimized as well.
The script editor now uses new graphics and can be minimized.
The html (help) frames now uses new graphics and can be minimized.
The map, battle, party and all "standard" frames (such as realm map) can now be locked through the right-click menu.
SHIFT+ENTER should now work as normal ENTER in the commandline.
When you close the OOF frame it should be automatically cleared.
Focus should be set on the last used commandline when the OOF frame "pops" up.
You can now select in the right-click menu in the OOF and party frames if they should be "auto popup" or not.
The bug that caused the client to hang and eat up 100% cpu when you moved a window that was partially out of view has been fixed.