From seeing the forums, it seems that getRowData is returning the the text value of the cells and not the original data. The best attempt seems to be to use $.unformat on the returned text values to try to get the original values.

Instead of going about unformatting the formatted value and trying to guess the original data, Grid should instead store a Javascript Array somewhere that contains the actual original data. Perhaps the TR element can store the raw row Object in an attribute somewhere.

In either case, Grid should return the actual original data and not try to guess the original data using $.unformat.