This is a high priority release. It patches a problem exporting xls macros in files with worksheets that have non-default names. Gnumeric and OOo could read results, MS Excel would crash. There are also a number of charting engine fixes. As a sweetener Nick Lamb's excellent work to support the older XOR style of encryption in xls was backported. We should now be able to import all encrypted or protected xls files (if you have the password :-)
New development is continuing in HEAD. gconf is our last remaining hurdle to a win32 build.