idienstler on "[Theme: Icy] After -tag content is missing"

I found a bug and I actually try to figure out where it came from.
I have some texts in my blog which consists of a <more>-tag.
If somebody clicks on "Read More" at the startpage the text after the <more>-tag is missing.
If I login as admin and click on "edit" I can see the text.
I'll have a look at the single.php