First glitch:



As you can see, when either of those formatting options are selected, they turn into black blocks. It's as if the image for them being selected are missing. This happens with the non-quick standard editor too.

Buttons affected are:
Switch Editor to Source Mode
Bold
Italic
Underline
Align Left
Center
Align Right
Bulleted list
Numbered list
Subscript
Superscript

So basically anything with an on/off state.


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Second glitch:



The Insert Image From Computer window is missing Ok and Cancel buttons.

The From URL window has them fine: