Extra spaces inserted when using AppendPage API operation

When I try to append html using the pbwiki 2.0 api and the AppendPage operation, it inserts spaces between paragraph tags. What's interesting is that the page looks fine, until you edit the page using the pbwiki UI. Once you enter the edit screen, the GUI editor looks fine, but if you click 'source', an extra set of paragraph tags are inserted between each piece of tagged html.

For instance:

http://testwiki.pbwiki.com/api_v2/?op...

produces

test1
test2

Now if you edit the page via pbwiki UI and save the changes, you get:

test1

test2

and the source code looks like: [w/out the % symbols]

<%p%> <%/p%>
<%p%>test1<%/p%>
<%p%> <%/p%>
<%p%>test2<%/p%>
<%p%> <%/p%>

Any ideas on what's causing this?