Bullet character disappears on mouse-over in IE8

Bullet character disappears on mouse-over in IE8. Error is even "Mark Forums Read" and even "The Team".

Error is with
ul.linklist.bulletin li:before

{ display: inline-block; content: "\2022"; font-size: inherit; line-height: inherit; padding-right: 4px; }

with [code]•[/code] there is no error in IE8.