Can't say it's started well: it only took me seconds to find the first bug in L5... 
As I had forgotten to Close All, L5 happened to open with Library open. A Library which I was almost unable to read. At first I thought the font slider setting had been changed, or the new font was smaller, but, no, no amount of magnification alters any font size but in the Title column:

Please fix this quickly, I kind of need to be able to see what I have in the Library.