This might be a coincidence but I just updated my HD530 graphics driver to this new release of 28/11/2018 and have experienced something very strange where I rendered a short section across 3x UHD MP4 clips to HD .mts, to test the Horizon leveling blurring bug reported elsewhere. These play fine in WMPlayer. On dragging these back into another project only the first couple of seconds play reliably and the rest of the preview turns black, as do the thumbnails beyond the first couple.
Further attempts to play the clips can show a few more seconds at random and the odd new thumbnail amongst the black ones further down the timeline. These clips were created prior to me updating to the new Intel driver but not brought into VPX until after the update.
This behaviour makes me think it may be a display (driver) problem. A German member has reported some strange behaviour with a recent update here: -https://www.magix.info/uk/forum/problem-nach-neuestem-update-des-intel-hd-graphik-ship-630--1218506/.
The Intel download warns that this latest driver uses a new Windows driver model and notes that if you need to rollback (suspicious?) you need to uninstall the driver via the Add / Remove Programs in Control Panel rather that using the rollback in Device Manager which could cause big problems. I had created a restore point before updating and hope that this will allow me to avoid all that but for the mean time I will monitor and test for other problems.
Anyone else noted anything strange?