Any time I tried to select one or more cells, InDesign CC crashed. Following your suggestion David, I turned off the drop shadow on the text frame containing the table and I can now edit my tables properly. I’ll just have to remember to turn my shadows back on once the tables are finished.
Thanks for the tip.

Hi Matt
Yes, that is what we are doing – every document in the book has the swatch called “chapter key colour” (or whatever) and this is used for paragraph, character, table, cell and object styles. Then we change the values for that swatch in each individual document so that each document has it’s own chapter colour. This works fine until we need to synchronise the styles across the book, eg we might need to change the spacing on a heading style or maybe move something on a master page or something else. We ensure that “swatches” is NOT ticked in the list of things to synch, then we synchronise and InDesign updates across the book but also synchronises the swatches which we have specifically unticked, resetting the chapter key colour swatch to whatever it is in the reference document (we usually use magenta for anything that needs to be updated). As Serg says above, we then have to go back to every document and redefine the values for the chapter swatch.
Are we missing something or is this a bug in the program? Happy to report it through the adobe bug site but just wondered whether we were missing some other setting somewhere or if there is a work-around to achieve the same outcome.
cheers
Kirsten