Bug introduced in 10.0 and fixed in 10.3
Can anyone replicate this? In Mathematica 10.2 on Win 64:
TableForm[{{a, b}, {c, d}, {e, f}}, TableDirections -> Row]
I get the following error message:
"The specified setting for the option
GridBoxOptions
,RowAlignments
cannot be used."
TableAlignments -> Center
makes it work. $\endgroup$