POP3 access using Windows Live Mail

About a week ago several of my comcast.net email accounts stopped recieving updates from the server.  I have been using POP3 servers for the last several years with no problems.  Occasionally one or two accounts(of 4) will get a update.  I went ahead and added a parallel account using IMAP servers and have no problems with updates.  I have several years of folder organized emails  in WLM.  The file structure is not duplicated on the comcast servers so the IMAP downloads come in in bulk (40K) messages.  What is hapening with the POP3 servers on Comcast?  Will they be corrected?