Random dialogue box

[BizzyLeo]

Well every so often after turning on my Macbook Pro, I get a random dialogue box that flashes for a fraction of a second. I can never read the dialogue since it doesn't even last a second. All I can say is that it has a yellow symbol on it and it appears after turning on (Kind of like the one up there ^^^). I noticed it started happening after I tried to setup MobileMe. Any help is appreciated!

 

[Detrius]

Does it happen if you log in as a different user?

 

[BizzyLeo]

Still happening

There is only one registered user in my Mac. It still happens every other time I turn my computer on.
Typically it happened after I'm logged in. After I open my first program (lets say Safari), while it's loading Safari the dialogue box appears and then disappears

 

[Detrius]

You completely missed the purpose of that question. Create another user, and log in to it. It splits the search area depending on whether it happens to another user.