Thanks for reporting these, guys... I think we've gotten them all taken care of.
For example I tried to search for this title:
What's Your Number? (2011)
This one is actually not a problem with the apostrophe, but with the year in parenthesis. If you search just on the film name, it comes up with no problem. I'm not saying there's not room for improvement, because we should probably recognize "(2011)" as an attempt to search on the year, not on the title, but it's more of an enhancement request than a bug.
An unrelated search issue is that when typing a movie name in the search box, it used to show results in a drop down menu while you were typing. It no longer does this for me.
This one should be fixed now!
Another example of a problematic search query: L'Âge d'or .
This one should also be fixed.
Thanks again!