Since we can't see the spread sheet structure, it's very hard to tell, but to me it looks like the data file has blank cells that are included. I don't see a differnce in the actual imports, but rather a difference in the cell border being applied to some of the blank cells, or possibly an underline attibute.
That said, if this is not enough of a clue for you to find what's going on, I suggest you re-post over in scripting. http://forums.adobe.com/community/indesign/indesign_scripting
Thanks for your answer Peter
The files / screen grabs were created manually. No scripting.
The same source Excel file was used.
Clearly CS4 vs CS5x are creating a different output.
All the lines you can see on the ID files are bottomEdgeStroke lines.
CS4 renders the table more or less as seen in the Excel sheet. CS5 adds extra strokes.
These are the things I can see at this point. I guess I am looking for the thing that I can not see, but maybe somebody else has come accross and can point out... or some sort of confirmation of this so I can get back to my client with some definitive answer.
Thank you again and talk soon
I would start by looking at cell styles and what has been applied for styles in the tables In ID.
On import from Excel no Table or Cell styles are created.
The table or any of the single cells do not show a style.
I do practically no work with tables at all, so the most I have to offer is starting points for your investigation. I cannot solve the problem for you. I will say, though, that I'm pretty sure all tables and cells, absent some other assignment, have a "basic" cell style or table style, just as the default for text is to use [Basic Paragraph].