Fatal Error Caused by: HelperImage

So I couldn't find a thread anywhere about this, so I'm thinking it had to do with a mod to the template. When I upgraded to 1.2.5 I fallowed the instructions perfectly and so far everything went well. When I went to test out purchasing products I got a message saying
I just deleted line 29 and it was a quick fix, but I would like to know if there was a better way or if that will effect anything. I'm looking into this further, but if someone knows off hand, it would save me time and headaches. Thanks.

you where right to remove this.

it does not need to be there.

I love the response time. I don't think I know another admin that replies to every single query.