They shut down the Marlin factory and moved production into the Remington factory. Mostly new inexperienced workers building rifles at first made for some real horror stories. To their credit they temproarily stopped production until they could fix QC issues.
To my knowledge they are back in production and supposedly have better quality right now. The new production guns are using cheaper wood and a more matte finish on the metal compared to the older versions, but this should not effect function.
Given an option I'd still rather find an older production rifle. I still like the features on the 1970's and 1980's rifles better than any. Even the older versions.