Created attachment 69430 [details] screen shot I have opened an xlsx file with 3.6.3.2 and the grid lines are way too thick compared with excel viewer. I have attached a screen shot and the original file.
Created attachment 69431 [details] original file
Created attachment 69436 [details] screen shot corrected content type
Created attachment 69437 [details] original file corrected content type
Created attachment 69438 [details] original file corrected content type
duplicate of bug 52100. *** This bug has been marked as a duplicate of bug 52100 ***