mubiesam: I fixed the issue for my import. Here's what I did...
1. download the two .zip files on this post: forums[DOT]phplist[DOT]com/viewtopic[DOT]php?p=16266#16266 and apply them. PS...you have to be registered & logged in to see the .zip files.
2. When importing the .csv file, in the field marked "Field Delimiter: (default is TAB)" you need to put a comma in that field, not the word comma, but an actual "," (without the quotes).
If you follow this, it should import. Mine did!