The latest patch resolves the variable speed problem amongst others. Here is the list of patches and details:

Changes in version 14.0.0.145:

Video speed can be controlled using keyframes again
Some transition templates are now displayed in the Media Pool
Peak meter response is working again during audio recording
Fixed issue with split files on exFAT drives
Fixed crashing in specific program situations
Corrections made to film look tamplate tilt shift

Changes in version 14.0.0.144:

Fixed crashing in specific situations
Made corrections to reduce MPEG2 encoding crashes on long projects
Fixed stability problems with some Decklink devices
Neat Video now works with Stereo 3D

Changes in version 14.0.0.143:

Improved DeckLink card compatibility
Fixed problems with measurement instruments on certain system setups
Small fixes made to: GUI/wording, VST plug-ins, audio effects, arranger handling, film template editing, shortcuts, proxy handling, travel route animations, mediapool/effects area, video plug-ins, MPEG2/MPEG4 export
Improved JPEG import compatibility
Fixed problems with playback in French version
Fixed crashes in special program situations
Objects no longer rest on the playback marker when object grid is turned off
Various fixes for problems in special mixing and effects constellations
MTS files with PCM audio can be imported with sound again