jQuery Accordion gets scrambled when shown from a display:none DIV

Question

Basically, I've set up a DIV in a display:none mode, showed when clicked (simple JS event). HOWEVER, I tried adding to the non-displayed div a qQuery Accordion; whenever the DIV is shown, the accordion is displayed incorrectly: the H3 tags are scrambled into the text, and the sliding/hiding won't go properly.

Removing the display:none shows this DIV perfectly. Everything works.

Why?

Thank you.