Using Openoffice 3.0 Release candidate 1 with the PDFImport extension version
0.3.1-Win32Intel, I get a reproducible strange behaviour and crashes:

Problem with PDFImport extension:
1. The extension installs fine.
2. The option Generate Hybrid file in PDF export is there.
3. I selected this option and exported the file to Hybrid-PDF.
4. Acrobat Reader displayed the PDF file correct.
5. Then, I tried to import the file to OpenOffice, but apparently, the import
extension did not work anymore (the file was imported as ascii text). Moreover,
from now on, the export to PDF dialog does not show the option hybrid file anymore.
6. According to the extension manager, the extension is enabled and should work.

Problem with OpenOffice.org crashes:
7. Then, I tried to deactivate and activate the extension again.
8. By activating the extension OpenOffice crashes. 
9. The same happens again and again after restart and trying to activate the
extension.
10. Then I tried to remove the PDFimport extension, but got the error message:
(com.sun.uno.RuntimeException) {{Message="unsatisfied query for interface of
type
com.sun.star.script.XLibraryContainer!",Context=(com.sun.star.uno.XInterface)@0}}