Table cell alignments and row alignments are not effective

Consider the following xwiki 2.0 code snippet:

(% width="250" %)
|11|12
|(% align="right" %)21|22
|31|32

While the output of this code produces the correct xhtml table, the cell alignments seem to be discarded by the skin (they are all left aligned). This is also true for row alignments.