Not sure if this problem arises on Windows. It Does on Macs.
Small Detail, but very frustrating.
If you want to change the Layer Style of a layer (Multiply, Darken, Color Dodge, etc.), you have to click twice every time you change to a different style. For example, if I wanted to change the layer style to Darken, I would click the layer style drop down, then I would click Darken. If I wanted to preview all of the layer effects, I would have to click 52 times! This seems ridiculous. The Layer Style drop down is the only drop down in Photoshop that know of that doesn't allow the user to cycle through with arrow keys. You can cycle through Opacity, Fill, Typeface, and any field with a numeric value with arrow keys. Why not Layer Styles?