Export to PDF question

I am trying to export a task (Requested Item catalog task) to a pdf file. Trouble is, it is truncating after showing only the first few comments. There are only maybe 50 lines or so in the activity log, but probaly only 20 or so being exported to the pdf file. Dooes anyone know if there are any restrictions on the type of activities captures in the export? I know about the system properties max lines property, but that is not the case here. cant find anything in the forums or on wiki either, but I'll keep seaching. Thanks, Mark S.