The problem seems to be related to the fact that the end of line in downloaded pls file is in microsoft format and not unix. I have downloaded a couple of pls files using wget and then replaced the end of line in them to with the command :% s/^V^M/\r/g and them opened the file in firefox from a webserver that I run locally and rhythmbox opens it up without any problems.
The problem seems to be related to the fact that the end of line in downloaded pls file is in microsoft format and not unix. I have downloaded a couple of pls files using wget and then replaced the end of line in them to with the command :% s/^V^M/\r/g and them opened the file in firefox from a webserver that I run locally and rhythmbox opens it up without any problems.