In Firefox 3 and Internet Explorer 7, the Issue context menu is overwritten by anything text in the calender if it is positioned in the way.

Caused by a conflict between application.css (at .tooltip and/or .tooltip:hover) and context_menu.css (at #context-menu li).

Recommended fix is to either lower z-index of .tooltip to a value below #context-menu li (leaving .tooltip:hover alone) or raise z-index of #context-menu li to a value above .tooltip, and raise .tooltip:hover even higher. Committer will need to determine which causes fewest conflicts with existing z-index values.

Issue found in Redmine 0.7.3 - seems to still exist in HEAD.