If any of you Opera 10 Beta guys use Sandboxie, and have it configured to allow direct access to Bookmarks and Wand information, then you'll need to edit the Sandbox Configuration a wee bit, as the path is different as well the name of the Bookmarks file.
That is of course if you haven't already done so.
These are the lines you need to add:
You can copy and paste this as long as you insert your own username:
OpenFilePath=C:\Documents and Settings\<username>\Application Data\Opera\Opera 10 Beta\bookmarks.adr
OpenFilePath=C:\Documents and Settings\<username>\Application Data\Opera\Opera 10 Beta\Wand.dat
I don't know if there's another way to do this or if a later version of Sandboxie takes account of this, but this is what I worked out for Sandboxie Version 3.36. and it works fine.