Heads up for those who purchased Wild and Wicked by Lisa Jackson at Kobo when it was on sale last January.
I just opened it up and found out it's kepub.
I had to convert to mobi then convert mobi back to epub to get rid of the JavaScript and Kobo style sheet.
The right way to fix it can be found in this
post but the quick fix above works good enough.
I haven't had this happen since Xmas 2011. This is not the same as the plain text, double chapter headers old Kobo epubs they sell.
It's a publisher epub wrapped in Kobo JavaScript code for their app and readers and looks horrible on a non Kobo device.