RichText Items - Hazardous behaviour

[Sunchaser]

Dear all,

-- Cognos 8.4, report designed for PDF output only --

I'm experiencing some problems with the use of some RichText Items in the same page of a report.
It appears that sometimes the behaviour is hazardous, some properties put in the tag are not taken in account, or crash at execution of the report and display some error messages which are strange or not relevant (as always with Cognos).
Even if everything works fine, if I only move one RichText Item in the page, for example to a table cell to an other, that it may crash again.

Does anybody has worked with several RichText Items and experience some similar problems ?
Note: if I put the same tags (sent in the report through the RichText Items) in a HTML context, then there is absolutely no problem.

Thanks
Regards,
Vincent.