Facebook Application User Testing (En, Fr, Sp, It)

Hi, We need 4 professional people to test our facebook application which we are constantly getting bug reports from and having trouble replicating them. We need people who have access to all browsers and OS's (Safari and FF on mac and FF and IE (7+8) on windows) who can do thorough test on the application with the different OS+browser setups and the different languages (English, French, Italian and Spanish) to help us identify the problems. So there will be four projects for 4 different people who all have the necessary qualifications to do this user testing. We will send you the major phenomena we have gotten reports about but have not managed to replicate as well. Every one of you should do a thorough test every 2 days and report to us any bugs you find and also go through all our current bugs and try to replicate them and let us know how you fix it (which browser, what operating system etc). Thank you!