In the task pane LibreOffice underlines a character in multiple button texts. For example "Add..." in custom animation has the A underlined. That signals that the user can press alt+A to run that command. But alt+A doesn't do anything. In fact, none of those alt+___ commands does anything. Either remove the underlined text or make the alt shortcuts functional.
The Version field of this bug is unspecified. I can confirm that this issue exists in LO Version 4.0.3.3. However, this issue has been fixed in LO Version: 4.1.0.1. So...I'm changing the status to RESOLVED-FIXED. I tested using WIN 8.