The following small patch seems to fix the problem:
<pre>
Index: src/wikiformat.c
===================================================================
--- src/wikiformat.c
+++ src/wikiformat.c
@@ -1404,10 +1404,11 @@
           if( backupToType(p, MUTYPE_TABLE|MUTYPE_TR) ){
             if( stackTopType(p)==MUTYPE_TABLE ){
               pushStack(p, MARKUP_TR);
               blob_append(p->pOut, "<tr>", 4);
             }
+            p->wantAutoParagraph = 0;
             pushStack(p, markup.iCode);
             renderMarkup(p->pOut, &markup);
           }
         }else
         if( markup.iType==MUTYPE_HYPERLINK ){
</pre>