owncloud/core — pull request #7943 by hjort (2014-03-28 18:14:14+00:00)
Title: Correction: failure on sharing when user ID was prefixed by zero

We were facing a serious issue on sharing feature because our identifiers may be prefixed by zeroes.
Our user IDs, CPF (see http://pt.wikipedia.org/wiki/Cpf) - similar to ISS in US, have the possibility to start with "0". In those cases unsharing or modifying a shared resource caused a failure.

The root cause is that, according to jQuery, data() function tries to convert the value into a number, ripping out leading zeroes. See:
http://stackoverflow.com/questions/7962464/jquery-data-attribute-removes-leading-zeros

Therefore, the correction to this issue consisted in replacing
data("name")
by
attr("data-name")

So far we found this issue on sharing feature. However, it may appear somewhere else in ownCloud sourcecode - core and modules.