I bought a mini lin speedy last sept and have been using it quite often, except when i decided to give her a rest last week for one whole week. Last night, when I bring her out, i saw some discoloration on the material where the lock is leaning against!!! there was a faint reddish patch. I suspected it is cause by the lock friction against the material..mini lin speedy owner out there, do you notice the same thing on your speedy? Is it normal? I am so worried now