Apparently Europcar have been accused of a doping scandal just yesterday, 2 days before the TdF.
You have to admire the timing of this
In fairness if you read the piece and the comments that have come up afterwords it's pretty much entirely rumour and hearsay and nothing has come of it. If the investigation was launched last August and they still got invited to ride this years tour then you have to assume there's not much in the story.
This link to the AFP story covers most of the latter comments.