(CL, sorry for the double email, forgot to send the initial reply to the mailing list, perhaps others may chime in with additional information) Putting it through the w3 validation tools: http://validator.w3.org/check?uri=http%3A%2F%2Fblogs.oracle.com%2Fobservatory%2Fen_US%2Ffeed%2Fentries%2Frss&charset=%28detect+automatically%29&doctype=Inline&group=0 Gives me 2 errors, which may be ignored by firefox but most likely not by thunderbird. - it looks like it's character encoding errors. (perhaps those who enter the news for that site are using a non-ascii character set?) Christopher Tooley [log in to unmask] Systems, HEP/Astronomy UVic On 2011-09-07, at 1:21 AM, carlopmart wrote: > Hi all, > > I have a strange problem with my thunderbird email client under SL6.1. > When I try to add this feed: > > http://blogs.oracle.com/observatory/en_US/feed/entries/rss > > thunderbird refuses to store this link showing this error: > "http://blogs.oracle.com/observatory/en_US/feed/entries/rss is not a > valid feed". Firefox doesnĄt have this problem. Where it can be the > problem?? > > Thanks. > > -- > CL Martinez > carlopmart {at} gmail {d0t} com