Unfortunately it seems that the last update has brought back some graphic glitches that were fixed previously.
When drag & dropping an event, it is almost transparent and hard to see, specially if the background colour is set to white (which is my case).
Even worse, in the key editor the notes being drag & dropped disappear completely, making it hard to work with. I have had to revert to the previous version because of this.
Also the cursor (long vertical line) occasionally turns completely white.