to_json performing inconsistently

Hi there,

I have two projects, both looking like they use the same version of
ruby, same version of rails, on the same machine. When I run console
within each project, the to_json call returns a different result.

'<a href="#" onclick="$(this).up(&quot;.positioned_promotion_list_item&quot;).remove(); return false;">'.to_json

=> "\"\\u003Ca href=\\\"#\\\" onclick=\\\"$(this).up(\
\u0026quot;.positioned_promotion_list_item\\u0026quot;).remove();
return false;\\\"\\u003E\""

and

'<a href="#" onclick="$(this).up(&quot;.positioned_promotion_list_item&quot;).remove(); return false;">'.to_json

=> "\"<a href=\\\"#\\\" onclick=\\\"$
(this).up(&quot;.positioned_promotion_list_item&quot;).remove();
return false;\\\">\""

Does anyone know what may be causing this?

Cheers,

Tim.