OCRed vertical Japanese text not selectable after update to 1.5.4 (and Catalina)
Windows > Merge All Windows = shuffles order of open, tabbed documents
New 1.5.4 syncable notes feature mistranslated or unavailable in Japanese version
Trackpad zooming and scrolling partly broken
Drag-drop to reorder notes
Window resizing bug
I see this is marked as "won't fix," but it's 100% clear that PDFkit is not (at least the only) cause. In many Japanese and some English documents (the two primary languages I use), it is only Skim that has this problem. Preview, Acrobat, etc., handle the text just fine. Skim gives the dreaded system beep. So while I think that Christiaan Hofman is right that it's file dependent, it's also very specifically a problem with Skim. So "won't fix" is really a shame. FWIW: Skim 1.4.34 (108) OSX 10.12.6(16G29)...
Same problem. Skim 1.4.32 (106) OSX 10.12.6(16G29) Recently repaired permissions, rebooted, etc. Additionally, there is no icon anymore. Hasn't been for a while (though since when I don't recall). Just the "plain square."