Yes, this appears to be a bug. For a quick workaround, consider using the
formats list, ul or ol, all of which also support the
template-parameter for formatting (and this one certainly works with SMW1.0).
Note that with list, you can also choose the separator between items
(parameter sep),
Not sure if it's related to this issue, but I also lost some data in
smw_attributes table (not all of it though). The worst part is that it
didn't reappear after I ran complete SMW_refreshData on the dataset.
I wonder what needs to be done to repopulate SMW tables from scratch?
Sergey