Mac OS X 10.5.4 was released yesterday afternoon. As as everyone can tell all the issues with Nav Services and InDesign have been fixed. Only one bug remains and it’s a minor one.
At this time there is still no fix for the cmd+h keyboard shortcut issue. In the interim, a limited workaround has been identified:
Shut-down InDesign, then restart. CMD+H should work until the OS is re-booted.
Red more about it Tim Cole’s InDesign BackChannel blog. Link