Use no spaces in the loop:
{foreach from=$myArrays item=currentItem}{$seperator}{$currentItem.title}{$seperator}{/foreach}
or use the smarty directive to make smarty remove spaces: {strip}/{strip}
:
{strip}
{foreach from=$myArrays item=currentItem}
{$seperator}{$currentItem.title}{$seperator}{/foreach}
{/foreach}
{/strip}