WordPress 3.5 Breaks FT Calendar date picker

Problem: When adding an event to a post/page, the calendar popup has a height of 1px and, thus, doesn’t show the calendar properly.

Cause: I think this has to do with incapable versions among the jquery included in FT Calendar and WordPress. Specifically, the class ui-helper-hidden-accessible is set to height:1px and this makes the calendar not display.

Workaround: Edit wp-content > plugins > ft-calendar > includes > css > write-edit-post.css and change:

div#ui-datepicker-div {
display: none;
}

to:

div#ui-datepicker-div {
display: none;
height: auto;
}