I released Meteor Slide 1.5.3 yesterday. This update has some minor stylesheet tweaks to fix conflicts with the new default theme, TwentyFifteen, as well as some other common theme issues. Meteor Slides 1.5.3 also includes a new Norwegian translation and updated Swedish translation.
Meteor Slides has been tested with the latest release of WordPress and is fully compatible. I have also tested the plugin with WordPress 4.0, but this is the minimum requirement. I don’t test any further back than that and I encourage everyone to keep WordPress and all of their themes and plugins updated.