mantra… I really cannot find anything in log…
In the report folder I’ve found the log called usntr.log
I’ve taken Winword as an example:

30/04/2011 12:13:17 Processing file C:\Program Files\Microsoft Office\Office12\WINWORD.EXE…
30/04/2011 12:53:47 Processing file C:\ProgramData\Microsoft\Windows\Start Menu\Programs\Microsoft Office\Microsoft Office Word 2007.lnk…

I think 30/04 was the last time I’ve booted the computer. So, seems that for me the cache is working.