Hi,
[ctrl] + [left/right arrow] to go to the begining/end of a line aren't working either in the cutting edge version. It works in the release 1215.
[ctrl] + [left/right arrow] now jumps between words -- words defined by 'traditional' word boundaries (space/punctuation) as well as "programming words" a lá space_case and camelCase
[cmd] + [left/right arrow] jumps you around beginning/end of line ...
For the record, that all works for me as intended: Version 1.5.3 (1258)
-steve