mattglet - 9:21 pm on Apr 6, 2010 (gmt 0)
Do a search for "Waiting for DNS confirmation of cookie domain"
A lot of reports with the beta builds of 10.52 have said this is now fixed (in the "snapshots").
If it still happens after/if you upgrade to the snapshot:
- Clear cookies for affected site (Edit Site Preferences)
- Clear history/cache
- Restart Opera