Centre message

Hi

you can try to add the following styles to your theme:

div.blockUI  {
  top: 50% !important;
  height:20px !important;
  margin-top:-15px !important;
}

This centers the message popup vertically. Please note that you have to set the correct calculated value for margin-top. It needs to be (the height + the bottom padding + the top padding) / 2 and bottom/top padding is 5px by default.
Maybe I will add built-in support for vertical alignment in one of the next versions.

Hope this helps…