My problem with her knowing him as Ten is - as I've said in a comment here somewhere - that it doesn't make sense given the fact that he swore off companions after Donna. He could have met River between JE and EoT, but by then, he's so broken that I can't see him wanting to actively seek someone out when he already knows how and when she's going to die and feels it's his fault.

Despite CT's assertion in the DWC that Donna's 'jealousy' is due to the fact that she loves travelling with the Doctor and doesn't want some other woman taking her place in the TARDIS - I think she's talking rubbish!