Since upgrading to natty alpha about month ago the issue has more or less disappeared for me (see my comment earlier re problem in lucid and maverick) - previously used to get it every single boot (i.e. daily) plus intermittently on top - since upgrading only had the issue once.
Note that upgrading to an alpha release is a bad idea for most - wait for proper release unless you can live with the breakages.
Would be good to know if it's also now fixed for Raj B as he was running an earlier version of Natty than I.
Since upgrading to natty alpha about month ago the issue has more or less disappeared for me (see my comment earlier re problem in lucid and maverick) - previously used to get it every single boot (i.e. daily) plus intermittently on top - since upgrading only had the issue once.
Note that upgrading to an alpha release is a bad idea for most - wait for proper release unless you can live with the breakages.
Would be good to know if it's also now fixed for Raj B as he was running an earlier version of Natty than I.