After adding the DLL search patch in Windows 7 registry at HKLM\System\CurrentControlSet\Control\Session Manager setting CWDIllegalInDllSearch to dword hex FFFFFFFF (not 1 or 2!)
the VLC Plugin does not load anymore with Opera 10.61.
Opera complains about not finding libvlc.dll.
//EDIT: fixed typo. Faulty wrote or instead of not. Sorry.