Google not updating title tags in SERPS

[BaseballGuy]

I own a blog that is ~4 years old. I rank #1 and #2 for some mildly competitive terms.

I am running Wordpress and on 5 posts on my site that are ranked in Google, I update those posts 1x per month. More specifically, I update the title of the post to include the current month's name.

I then update a few lines of text/data and that's that.

I updated my 5 posts on March 31st (last Wednesday). Google has still not updated the title tags in the search results, so when people search for the new title, my post shows as #1, but Google is showing the title tag from last month in the results.

My site is medium sized and I have a decent amount of inbound links. I update the site 1x per day by making a new post, but only the ranking pages 1x per month.

This just started last month....and going back 2 years, the title tags would be updated immediately or very soon in Google.

I can't figure out what's wrong. GWMT shows no errors and my sitemap is up to date and accessible.

Anyone ever encounter something like this and how to remedy?


thanks

[edited by: tedster at 6:36 pm (utc) on Apr 2, 2010]
[edit reason] removed specifics [/edit]

[tedster]

That seems like another area that is on a long delay while they work out the Caffeine roll-out.

[BaseballGuy]

Thanks Ted.

The guys ranked above and beneath me....their title tags changed within an hour of them changing.

My title tag (going from "March keywords" to "April keywords" and making a few minor data changes in the text area of the site) are still reflecting "March" in the SERPS.

I'm wondering if I should take this personal and see it at Google not liking me? (of which I see no reason why because I'm completely timely on making necessary changes to be the most relevant. Maybe a computer program can't tell it, but a human being sure can).

[edited by: tedster at 1:40 am (utc) on Apr 3, 2010]

[tedster]

Does your blog ping Google automatically when you make a change?

[BaseballGuy]

Yes.

I have sitemaps (xml sitemap plugin) and feedburner working as well.

However, today I found an issue with my feed in which line #1 was coming off as blank. Got an error message when I tried to validate it. DL a plugin to fix it and my feed is working properly as of today. Wasn't for a few weeks (how often do people look at their feed?)

It's apparently a well known error in Wordpress, but I doubt the cause of Google not indexing the updated (4 year old) page. There are no spammy links/shady doings going on. Pure white hat.