I'm going through Low Quality Posts for the month at the following link:
https://superuser.com/review/low-quality-posts?s=1&pagesize=15&filter=month
I scroll to the bottom of the page, and click the "get 30 more" link. The "month" filter is lost.
If you look at the resulting URL, the &
are &
which is why it can't parse further parameters.
&
but the page is not set to XHTML.&
with&
and browsing there works like a charm (keeps the filter), so that's clearly the issue.