Hi svenl77, the error you are reporting is not the same as cosycarb's error. I only introduced the usage of uniqid in the latest v0.10.3 which I only released today. I double checked the documentation and apparently calling uniqid with no parameters is a PHP5 version, PHP4 version requires at least one parameter, so I'm assuming your using PHP4?
To quickly fix this just go to tdomf-db.php line 252 and you'll see that there is a commented out line at 251. Uncomment it and comment out line 252 (the one with uniqid).
$session_key = tdomf_random_string(15);
#$session_key = uniqid();
This should get you up and running. I'll fix this for the next version. Sorry, I didn't mean to go all PHP5-out on you! :)