LinkedIn => Error [type] => E [nt] – Caused by Apostrophe

I had two recent post that erred sending to every LinkedIn group but not to the personal LinkedIn account. After some doing some searching I found that this error could have something to do with a missing “Title”. My message is the following: %TEXT% – %SURL% , from http://domain.com

Both of the Post that were erring had an apostrophe (‘) in the title. Once I removed the apostrophe I attempted to re-post and none of the groups erred.

This is an indication that you can’t have an apostrophe in the title. Are there any other non-alphanumeric characters that can’t be used in the title?