The to.period() family of functions now use the index timezone when converting intraday index values to daily values (or lower frequency). Thanks to Garrett See and Gabor Grothendieck for the reports (#53, #277).

Make column names for merge() results with unnamed objects shorter and more like zoo (#248). This also makes na.fill() much faster (#259). BREAKING: This may break existing code for integer unnamed objects.

Fix subset when index(x) and i contain duplicates. Thanks to Stack Overflow user 'scs' for the report, and Philippe Verspeelt for debugging (#275).

Fix if-statement in xts constructor that may use a logical with length > 1. Thanks to @HughParsonage for the report and PR (#270, #272).

Register shift.time.xts() method. Thanks to Philippe Verspeelt for the report and PR (#268, #273).

Conditionally register S3 methods for as.timeSeries.xts() and as.fts.xts() when their respective packages are available (as requested by CRAN). Note that this means these two functions are no longer exported. This may break some existing code that calls the methods directly, though 'best practice' is to let method dispatch determine which method to invoke.