nothing new wanny all lines crack... jsut the way she goes!!!!! like jack pointed out it has something too do with the casting.. airflo lines seemt too be the most durable out of any other imho.. they crack te least and last the longest.. useto love my SA stuff when i was a kid but i havnt fished any of there lines in 5 or 6 years now.. rio has a few sweet tapers too but airflo is slowly taking over almost all of my lines with teh exception of a few loop lines...