According to Microsoft, Vista doesn't use thumbs.db anymore, so the problem of thumbs.db getting created on network shares has been fixed. But, then Microsoft broke it again with Vista SP1.
Next registry edit, diabling thumbs.db from showing up on my Mac network shares. Here's a quote…
– Open the Registry Editor (regedit.exe).
– Navigate to the following registry branch: HKEY_CURRENT_USERSoftwareMicrosoftWindowsCurrentVersionExplorerAdvanced
-On the right pane, double click on DisableThumbnailCache value, and set its value data as 1. If the registry key of – DisableThumbnailCache does not exists, create a new DWORD value with that name.
– Logoff and login again, or restart the computer for the changes to take effect.
…boom. No more Thumbs.db.