20100430 is out now. The replace panel bug where tab wasn't working until the mouse was used in fixed.
Also new in this beta is the onQueryContext API, for plugins to expose key binding contexts. For example:
def onQueryContext(self, view, key, value):
if key == "isNumber":
isNumber = True
for s in view.sel():
char = view.substr(s.begin())
if char < '0' or char > '9':
isNumber = False
return isNumber == (value == "true")
This plugin defines a new key binding context, "isNumber", that allows key bindings that only trigger if the cursor in next to a number. The corresponding key binding would look like:
<binding key="ctrl+t" command="whatever">
<context name="isNumber" value="true"/>
EDIT: Also, memory usage is substantially improved with many files are open. Startup speed is better due to better IO scheduling, and the CPU time required for startup has also been reduced.