The defect is apparently the same in each case, with the cover splitting at the seam closest to where it magnetically connects to the Surface tablet.
“Right in the middle on the seam it tore open, and pretty quickly too. I'm gonna [sic] exchange it this weekend”, wrote one poster on the Surface Forums. Other posters seemed to indicate that Microsoft will exchange faulty models for a new unit.
The Guardian has asked Microsoft for a comment on the issue as to whether this is part of a bigger problem, but is yet to hear back from the Redmond software company.