Issue: Line breaks dissapearing

Lately everytime I tried to edit the thread in my group, when I save it the post loses all the new lines and I have to re-edit and press enter again for every new line (It's for a list of users etc).
http://aarinfantasy.com/forum/groups...musicians.html
It's getting extremely irritating since I have to re-do the lines everytime I wanna edit a little thing, and sometimes I even have to go into the advanced edit mode for it to save the line breaks.
Is anyone else having this problem or is it just my group...?