Nesting too deep?

[anno1986]

What I figured out in my current setup:

I guess I am running PHP5.3 where this error occurs. As soon as I change to a higher PHP version I do NOT GET "Nesting level too deep - recursive dependency? "

What I also noticed it HAS something to do with images in admin panel.
When I comment out the following:

# FILE admincp/view/shopview.php LINE 62
$showForm->buildDropdownList("existingimageurl", "ImageList");

I was able to edit my shops again..

So I went deep into detail but got stuck here:

# FILE classes/resource/collection/linkedhashmap.php LINE 68
error_log('------ '.$key->__toString().' -- '.$value->__toString().' hash: '.$hash.'  index:'.$index);
$this->createEntry($hash, $key, $value, $index);
$eldest = $this->header->getAfter();
if($this->removeEldest($eldest)) $this->removeKey($eldest->getKey());
else{
if($this->size >= $this->threshold) $this->resize(2*$this->entries->length());
}
error_log('---- OK');

The last image where it stops nothing special:

# table {prefix}_filesmap
id|serverpath|wwwpath|friendlyname
16|
picuploads/png/6359d04458e086935c5abadbabc389ec.png|
http://evosl.com/fae/picuploads/png/6359d04458e086935c5abadbabc389ec.png|
exotic

Any ideas???