When searching an account ledger within the Cash Accounts tab, search strings including an apostrophe return no results for account names that contain apostrophes.
For example, when searching for “Owner’s” nothing is returned based on transactions listed for the Owner's equity account. But if the string is truncated to just “Owner” all entries involving the Owner's equity account are returned.
The problem seems to apply only to account names. Apostrophes in descriptions do not affect results. In fact, if a description includes the phrase “Owner’s equity” it would be returned on the basis of a match to the description, but not to the identical account name listed on the same line of the ledger.