There are a couple of known bugs; some of them are rather hard to find so they are not described here.

1: Vanishing or misplaced tags in header/footer
In some cases, the program cannot figure out where to insert (or replace) header/footer tags. Quite often, it helps to add some extra tags in order to help the program 'figure out' the correct position.
E. g. a document consisting only of
<title>This is my document.</title>
may be processed wrongly (depending on the template), but if you use
<head>
<title>This is my document.</title>
</head>
<body>
the program can handle it.
