When we have a tagged document that has a tagged table, where the table has some vertically oriented text in it, the table editor will not display the TH and TD tags correctly, even though the tags in the tag tree are correct. Basically, most of the TDs and THs simply do not display in the table editor under these conditions. Here are some images:
Here I have highlighted the cells:
...and With Table Editor turned on:
It is a little difficult to see, but in table editor only about 15 cell show up. Normally I would just say, "hmm, what a strange quirk," but we have a client that uses the table editor to determine if the table is compliant with 508 standards. (I know this is not the best way to do this, but they are the client....) They are saying this table is non-compliant because of the way it displays in the table editor. This quirk seem to happen in both Acrobat Pro X and Acrobat Pro XI. Anyone have any ideas about how to fix this.
P.S. We also use Commonlook to remediate compliance, and in that product, these tables all check out fine.
Have you set the Row Span property correctly for the cell that spans multiple rows? There are some free tools for displaying the document - including the table - in the way that it would be presented by assistive technology. These are a huge help with the human-inspection-needed aspects of accessibility checking PDFs:
Of the four, PAC 1.3 is my favorite when working with tables.