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For Grid[], Frame of specific cells disappear with Dividers

This (from the Frame[] help page) works fine: Grid[Table[x, {4}, {7}], Frame -> {None, None, {{1, 1} -> True, {3, 3} -> True}}]but this does not, as the frames disappear: Grid[Table[x, {4}, {7}], Frame -> {None, None, {{1, 1} -> True, {3, 3} -> True}}, Dividers -> {{False, 6 -> True}, False}]I have a workaround using Item[foo,Frame->True] but it is much uglier code....Read more