We are seeing reports that some bloggers in Pakistan, who are customers of PTCL Broadband, are logging in to Blogger and are being presented with the dashboard for somebody else's account. Specific details, about ability to actually use the other dashboard, are not clear.
One blogger has reported that other Internet services, such as Facebook, are also affected. Facebook has blocked access from the PTCL address blocks involved in the problem.
More detail is available in Further PTCL Broadband Blues.