matlab7.0 report generation rtf

I want to creat a report with the report generation.when the File format is Html or docbook,everything is ok.But when i choose rich text format,the converting process get into trouble. I noticed an important message in the "all message list" which is "there is no attribute xml:space".So i make a very simple report with a title page,a zpk and a figure.First i report it as a html format and then use the "convert source tool" to convert it into a rich text format.The result is the same as before.Just like the html is broked when convertedinto text.I also tried Matlab6.5 and 2008, both can creat a rich text format correctly.Is there any special settings i have to make?Or is this just a bug? I search this problem in the internet,seems no one mentioned it. Thanks a lot !