PHP Script Log Error

I’m seeing the following error:
[11-May-2009 00:41:28] Invalid character at line 128, column 1475
How would I find this to correct it or do I really need to?

I did FTP into my account and downloaded the file from logs_web but couldn’t find the time, or anything close, that a file was requested.

I saw some other errors for some WordPress plugins so I deactivated the plugins.

I’ve been having a problem with disappearing draft posts and thought this or the plugin errors might be the cause.

Any other suggestions where I might look?

Thanks,

Tom Husband