clipper problems! help polyvore!

whats up with the clipper? it wont let me do photobucket, facebook, google, tiny pic, myspace, any blogs, NOTHING! what do i do? i just want to upload my photo but i dont know from where. heres more details: ill go on the site, ill click on my polyvore clipper, and then my polyvore box pops up and sometimes it lets me highlight the picture with the green outline,and sometimes it just goes straight to "sorry, polyvore wont allow images from _____" or something like that. and it says the same thing for EVERY site. :/