gobble de gook on uploaded page

[digiman100]

Very often when I upload a new page to our website there is a load of "gobble de gook" on it before my wanted text starts.  this only seems to be there the first time the new page is accessed and it happens on other machines as well as the one I have uploaded it from.  An ideas?  I have attached a JPG  that shows the sort of thing I mean. 

[Dr.CSS]

Those are smarty errors and from what I can see, not quite big enuf image but, it looks like you have some styling in the head or body which has {  } in it, please to wrap it in {literal} your code {/literal} which is spelled out in the default templates as to why you should do this...

[digiman100]

Thanks Dr.CSS for trying to help but I'm afraid your explanation has gone right over my head as although  I am trying hard to get to grips with html and css but a lot of it is still beyond me.

You were right to suggest that they are smarty errors, sorry about the poor .jpg.
I am now confused about:

As this effect can happen on any page then can it really be in the page "body" and it doesn't always happen? Or do you mean it is in either the template or the CSS?
How come the smarty errors disappear if the page is accessed a second time?
I don't understand what you suggest I look at in the default template, I didn't think I had changed anything in the one I am using?

Any more clarification would be really appreciated, tks

[Dr.CSS]

In the first default template, CSSMenu left + 1 column, in a fresh install...

{* the literal below and the /literal at the end are needed whenever there are {"curly brackets"} as smarty will think it's something to process and will throw an error *}

I have no idea where yours is as I don't have a link to it...