Type a bad path into the location bar.  A red bar appears below informing you that "The file or folder /blah/blah/blah does not exist."  There is a red square to the left of the message with a white X on it.  There is a red circle to the right of the message with a white X on it.  Clicking on the circle dismisses the alert.  Clicking on the square does nothing.

Suggestion: either use no icon to the left, or use an icon that does not suggest a clickable action, such as a yellow exclamation point.

Reproducible: Always

Steps to Reproduce:
1. Type a bad path into the location bar. 
2. A red bar appears below informing you that "The file or folder /blah/blah/blah does not exist."  There is a red square to the left of the message with a white X on it.  There is a red circle to the right of the message with a white X on it. 
3. Click on the square with the X
Actual Results:  
nothing

Expected Results:  
square with red X looks like dismiss/close button, expected alert message to disappear