diff -ur helpcontent2.old/source/text/shared/01/ref_pdf_export.xhp helpcontent2/source/text/shared/01/ref_pdf_export.xhp
--- helpcontent2.old/source/text/shared/01/ref_pdf_export.xhp	2008-06-03 16:26:53.000000000 +0200
+++ helpcontent2/source/text/shared/01/ref_pdf_export.xhp	2008-11-02 21:04:50.000000000 +0100
@@ -244,7 +244,7 @@
 <paragraph role="paragraph" id="par_id2107303" xml-lang="en-US" l10n="NEW"><ahelp hid=".">Click to open a dialog where you enter the password.</ahelp></paragraph>
 <bookmark xml-lang="en-US" branch="hid/filter_CheckBox_RID_PDF_TAB_SECURITY_CB_SEL_PERMISSIONS" id="bm_id824610" localize="false"/>
 <paragraph role="heading" id="hd_id4071779" xml-lang="en-US" level="3" l10n="NEW">Restrict permission</paragraph>
-<paragraph role="paragraph" id="par_id7844477" xml-lang="en-US" l10n="NEW"><ahelp hid=".">Select to restrict some permissions. The permissions can be changed only when the user enters the correct password.</ahelp></paragraph>
+<paragraph role="paragraph" id="par_id7844477" xml-lang="en-US" l10n="NEW"><ahelp hid=".">Select to restrict some permissions. The permissions can be changed only when the user enters the correct password. Note that this will only be effective when the PDF file is opened by programs that implement user restrictions (such as Adobe Reader). If you want to reliably prevent unwanted recipients from reading your document, it is recommended that you use encryption (see above).</ahelp></paragraph>
 <bookmark xml-lang="en-US" branch="hid/filter_PushButton_RID_PDF_TAB_SECURITY_BTN_OWNER_PWD" id="bm_id8016602" localize="false"/>
 <paragraph role="heading" id="hd_id6478469" xml-lang="en-US" level="4" l10n="NEW">Set permission password</paragraph>
 <paragraph role="paragraph" id="par_id9038972" xml-lang="en-US" l10n="NEW"><ahelp hid=".">Click to open a dialog where you enter the password.</ahelp></paragraph>