Earlier this morning while logged in at southwest.com, there was a notice reading:
The "Learn more >" link went back to the same page I was on with simply "?int=#?clk=3804032" appended to the URL.
ETA: More recently this morning, logging in to view upcoming flighs displayed just the usual blocks of color on that page, with no text loading at all. Unless it was problems with my Internet connection, that may have been related to them trying to fix the "Learn more >" issue.
[more to come...]