# CreatePalette producing two palettes

f := CreatePalette[PasteButton[α]];

f


Evaluating f will generate two palettes and this is not expected. Before version 10, I always get one.

Is this a possible bug? Or something change in this behavior?

I'm on windows 8.1 x64 and v10.0.1.

A friend told me

f[] := CreatePalette[PasteButton[α]];


will generate only one palette. The problem is I must type [] each time I call this palette.