Yesterday, I registered with LinkedIn and sent out a few invitations to people I know who also have an account.
Sadly enough, LinkedIn didn't like my name, Frédéric, quite as much as I do, so the invitation emails ended up being signed like this:
I'd like to add you to my professional network on LinkedIn. -Frédéric
I reported the bug and hope they fix it soon. For now, I replaced my "é"s by regular "e"s but of course they are only half as nice :)
Sorry for the inconvenience to everyone who though "who the heck is that?" when receiving my email.
(Thanks to Brandon and morgamic who told me about the problem.)