Tables in epub files generated from Indesign CSS are messed up. First, they all have black lines around them (which disappeared fine in the ID CS6 mobi output) and the cells were all squeezed together and set left.
A year ago it was suggested I get into the file and change them one by one, but I have hundreds of them, and in any case the only thing I could control was the black outlines...
What version of InDesign(There is no InDesign CSS)? Fixed layout or reflowable? Where are you viewing these EPUBs?
Sorry, I means InDesign CC, the latest version. And I am viewing them on my iPad.
You might consider turning your tables into JPGs and using these instead.