I see a blue bullet in the li items of the player and the sequencer. This is the ul list-style-image of the vector skin. It is attempted to override this using "list-style-type: none", but that is not successful for all browsers.
To really unset a list style such as that, use:
list-style: none none;
Note the double none, because list-style is a compounded type of list-style-type and list-style-image. This was tested and confirmed working for another ul element that had similar issues. The Template:Unbulleted list of the English Wikipedia. http://en.wikipedia.org/w/index.php?title=Template:Unbulleted_list
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Severity: normal