title: ttk widgets lose quality and become smaller when hovering over them
body: <p>Here is a very simple example:</p>
  
  <pre><code>from Tkinter import *
  from ttk import *
  
  tk = Tk();
  cb = Checkbutton(tk, text="Checkbutton"); cb.place(x=10,y=10)
  rb = Radiobutton(tk, text="Radiobutton"); rb.place(x=10,y=50)
  tk.mainloop()
  </code></pre>
  
  <p>At start, I see two nice buttons (much better than the corresp. Tkinter ones). However, when I hover over them, 1) they become smaller and 2) lose quality. Does this happen to you too? If not, please let me know the Python version you are using. (I use Python 2.7). Please just copy and run the code as it is. Thank you. </p>
  
  <p><a href="https://i.stack.imgur.com/OEBje.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/OEBje.jpg" alt="enter image description here"></a></p>