2.5 – not always receiving comment e-mails

Before installing 2.5, I would receive a copy of the comment in my e-mail immediately after it was posted or after I approved it via moderation. I have it set up so the first time someone posts a comment on my blog, i moderate it and each comment after that, it is automatically showing. Anyhow, I was watching it to try to determine if there were only specific times when I wouldn’t receive a comment but I can’t seem to find a pattern with it. So now i am receiving some comments via e-mail, not all and sometimes they aren’t immediately e-mailed to me, but rather a few minutes later. Any thoughts?