Spark 2.5.8 is now available for download here.  This release fixes a number of bugs, including some nasty memory leaks, and includes a few new features.  One of which is that all of the transports that the IM Gateway plugin supports are now supported in Spark, so if you were using the Extra Gateways plugin before, please delete it!

The change log can be found here.

Enjoy!

Spark Team