lol. Panic is a well-known software company that makes Mac stuff (Transmit is the best ever FTP client btw). 'Panicalia' is merely a play on the word. you know, like 'memorabilia'.
the icon in question here is Audion. it's an old MP3 player of sorts by Panic. it's not in development anymore and is now available free of charge. check out the icon and you'll notice that it's a blatant ripoff.
You need to clear your browser's cache. All the various urls that point to the main portal are pulling from the same files/folders location. i.e. changing 1 file/folder means all the others are changed.