links with XWiki 2.1 syntax never call setQueryString() for queryString parameters

When I do the following in a XWiki 2.1 syntax document it doesn't work as expected:

[[My Image>>attach:$doc@myimage.jpg||queryString="width=300"]]

I would expect:

<a href=".../myimage.jpg?width=300">My Image</a>

but instead I get:

<a href=".../myimage.jpg" querystring="width=300">My Image</a>

According to vmassol:

[14:17] <vmassol> public void setQueryString(String queryString)
[14:17] <vmassol> in AttachmentResourceReference
[14:17] <vmassol> is never called apparently

Please fix!