Created a template in Writer with some basic, customized styles.  After copying 
and pasting text content into the template, and saving as Rich Text, reopening 
the .rtf file in Writer shows the name of the custom style at the top of the 
document.



Template and sample .rtf is here:

http://sak.102010.org/workshop/writer_rtf_bug.tar.bz2

Steps to reproduce:

Open SSManuscript_test.ott in Writer as a template.
Copy and past some amount of text beneath the "Title" and byline.  (First 
indented line will be the first line of SSDefault custom style.)
Save the document.
Choose Rich Text Format (default settings, automatically append, etc.)
Choose "Keep Current Format" option in dialog.
Open .rtf file.

Top of file, next to Author Name, will contain extraneous text: SS Default;  
(The name of the custom style created for the template.)

The extraneous text doesn't appear when opening the .rtf document in MS Word 
2010.