Hi, In addition sorry for me bad english...

I have a problem with my eshop which is on address http://www.doutniky-obchod.cz, it is Zencart 1.3.7.1. I made many changes for resulting layout and design. I tested eshop on localhost and internet from my home computer, from work... and everything is OK.

But today I show eshop to my friend and He said that have some errors. He is conected to internet from work on another computer. He have not this problems with another zencart eshops so that must be some problem with my zencart modification. This is errors which he see:

1) http://i30.tinypic.com/2z580tu.png - this error is in categories product listing...
2) http://i32.tinypic.com/j7s4f4.png - this error is in all product listing
3) http://i32.tinypic.com/2cnayys.png - this error appears after sending order

I have not any problem in my computer, I do not see any of them errors and also another people do not see this too... only my friend. So I do not understand where the problem is and also I can not testing this error on his computer because it is inaccessible for me (in work)

So, I do know how can I discover this errors that I do not see them on my computer and localhost too...

I made some investigation of this errors and here is results:

1) this error is a result of function zen_run_normal() in file functions_lookups.php on line 705, this function is calling in file product_listing.php > http://i27.tinypic.com/mvg4tc.png which is most probably output of categories product listing...

2) this error, I do not see in which file is... but function zen_run_normal() is also in directory product_new in file header_php-php, maybe it is related with previous error...

3) this error is come up from file functions_email.php on line 437 http://i26.tinypic.com/o01pxi.png and in file functions_general.php on line 44 http://i30.tinypic.com/jjpqo2.png ... I think that this two errors are in relationship. This errors is appears after sending order. It is interesting that order email has been sending without problem but instead of finish order page in browser appears this errors...

So, I do know how resolve this errors, I can not solve them on my computer because I do not see them and also I am beginer in php so I do not know how repair problem in php without viewing result.

Can you help me please somebody with any idea how can I solve this problem?