Comments on blogs and websites not showing up

[Seb742]

As of last week comments that I leave on blogs and websites are not showing up. Many of these are sites that I have been commenting on for over a year. I have contacted the site owners and asked them to check their spam catchers. None of them have found my messages in spam and none has been able to make any suggestions to solve my problem. I seem to have the problem regardless of whether I use Safari or Firefox. I have an iMac G5 running Leopard ( 10.5.8 ). I have tried resetting cookies all to no avail. I appreciate any help anyone can give me. Thanks, Seb