While JDownloader is good, I use the Firefox Greasemonkey add on with Rapidshare links checker. For most sites, I get a red x or a green check by the link. That way you can see which links to use.
I've got the same problem. I'm using Firefox 3.6.8 on LinuxMintDebian 9. No buttons to say "Thanks" are visible.:( I'll install another browser and try again tomorrow.