To make the Hotkey errors go away I renamed eq2ui_mainhud_hotkey.xml to eq2ui_mainhud_hotkey.BAK in the fetishui folder. This changes you back to the default hotkeys.
To make the Icon Size slider work, open eq2ui_hud.xml in your fetishui folder using "Notepad". Then insert a new line with the following code:
Code:
<include>eq2ui_hud_slider.xml</include>
right after the line that reads:
Code:
<include>eq2ui_hud_selection.xml</include>
You should make a backup copy of your eq2ui_hud.xml file first in case you mess something up by accident.