Localisation errors

the problem is that there's no need to call t() inside a format_plural() call, as t() is called by format_plural iself.

format_plural($product->qty,t('1 order'),t('%count orders')) should be
format_plural($product->qty,'%count order','%count orders')

note that this not the only issue with translation. i started a patch for these but i need to resync it with head. use this thread to post any other translation related issue you find, i'll then be able to check the one i missed, and will send the patch here once finished.

here is a patch to fix various translation issues for head, including the one above in cart.module.

the patch is head port of http://drupal.org/node/31936.

Reclassified: uses the 4.6 API.

In addition, the issue remains present, at least for product.module/product_unit_nice_name, in the 4.7 version.

Patch should be updated for 4.7 by replacing the form_* calls by FAPI forms.