Are you posting through using the Dashboard in your web browser, or through an email account?
There is something very strange happening right after the word “museum” in your latest post. The source code shows a callout for a script, which should not be there. Take a look at everything after the word “museum”:
<p><script><!-- D(["mb","<font sizeu003d\"2\" faceu003d\"Arial\"><span styleu003d\"font-size:10.0pt;font-family:Arial\">Daarna zorg ik voor een leuke locatie in Ieper voor eenngezond avondmaal…</span></p>
<p>nn<font sizeu003d\"2\" faceu003d\"Arial\"><span styleu003d\"font-size:10.0pt;font-family:Arial\"> </span></font></p>
<p>nn<font sizeu003d\"2\" faceu003d\"Arial\"><span styleu003d\"font-size:10.0pt;font-family:Arial\">Het is idd een eindje rijden maar ik denk dat het alleennmaar leuk kan zijn om eens met de familie een uitstapje te wagen…</span></font></p>
<p>nn<font sizeu003d\"2\" faceu003d\"Arial\"><span styleu003d\"font-size:10.0pt;font-family:Arial\"> </span></font></p>
<p>nn<font sizeu003d\"2\" faceu003d\"Arial\"><span styleu003d\"font-size:10.0pt;font-family:Arial\">Ik heb misschien niet alle e-mailadressen, gelieve dannverder rond te sturen naar iedereen…</span></font></p>
<p>nn<font sizeu003d\"2\" faceu003d\"Arial\"><span styleu003d\"font-size:10.0pt;font-family:Arial\"> </span></font></p>
<p>nn<font sizeu003d\"2\" faceu003d\"Arial\"><span styleu003d\"font-size:10.0pt;font-family:Arial\">Vele groeten,</span></font></p>
<p>nn<font sizeu003d\"2\" faceu003d\"Arial\"><span styleu003d\"font-size:10.0pt;font-family:Arial\"> </span></font></p>
<p>nn<font sizeu003d\"2\" faceu003d\"Arial\"><span styleu003d\"font-size:10.0pt;font-family:Arial\">Rembert</span></font></p>
<p>nn<font sizeu003d\"2\" faceu003d\"Arial\"><span styleu003d\"font-size:10.0pt;font-family:Arial\"> </span></font></p>
<p>nn<font sizeu003d\"2\" faceu003d\"Arial\"><span styleu003d\"font-size:10.0pt;font-family:Arial\">PS : als iemand een lumineuzer idee zou hebben u003d&amp;gt; shoot…</span></font></p>
<p>nn<font sizeu003d\"2\" faceu003d\"Arial\"><span styleu003d\"font-size:10.0pt;font-family:Arial\"> </span></font></p>
<p>nn<font sizeu003d\"2\" faceu003d\"Arial\"><span styleu003d\"font-size:10.0pt;font-family:Arial\"> </span></font></p>
<p>nn<br />
nn<br />
nnn<br />
nn<font sizeu003d\"2\">–<br />
nNo virus found in this outgoing message.<br />
nChecked by AVG Free Edition.<br />
nVersion: 7.1.409 / Virus Database: 268.13.18/506 - Release Date: 30/10/2006<br />
n</font></p>
<p>nn”,0] ); //–></script>
Why is AVG inserting a script into your post?
In short, if you delete that latest post (keep the text, put it into a Notepad file, and then you can insert it back later), your site should be fine.
But how are you creating new blog entries?? That’s the question, I think.