If you have problems resizing windows by dragging the borders of the window, change the properties for the theme you are using, e.g.:

sudo gedit /usr/share/themes/New\ Wave/metacity-1/metacity-theme-1.xml

E.g., as follows:

<!-- general window layout -->
...
<distance name="left_width" value="5"/>
<distance name="right_width" value="5"/>
<distance name="bottom_height" value="5"/>

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