I have added the line to the php.ini file in my public_html directory. Nothing has changed.

I find all of this a little odd as I have never had such errors with any other component that I have installed.

We tested this component on php 5.3.
What version of php do you have?

If I look on php 5.4, there is newly E_STRICT as part of E_ALL
error_reporting = E_ALL & ~E_DEPRECATED & ~E_STRICT

I really don't know what else can create this type of error. If this settings for error_reporting will not help, maybe VirtueMart or any other component is overwriting error_reporting settings.
You had never such errors with any other component you've installed, but you are also first one, who get this type of error and php.ini has no effect on it.
If my last advice will not help, then please, send us ftp access and admin access to Tato emailová adresa je chráněna před spamboty, abyste ji viděli, povolte JavaScript , so we can check, what causes this problems.

Hi Maju,

Apologies for the delayed reply.

I am no expert in php etc so that may be causing me some issues.

I am using 1&1 hosting and the global PHP version is set to 5.4

The local php.ini override file has been set up as you have indicated.

I will send you admin and ftp access so that you can have a look.

Seasons greetings...

Hi again,

I managed to get this issue fixed by my brother who does know something about php.

He says it is becuase some methods that were being called as static methods were being called as instance methods.

I am attaching a zip file with the original and modified versions for your reference.

Feel free to contact him if you wish to discuss: Tato emailová adresa je chráněna před spamboty, abyste ji viděli, povolte JavaScript

Hello. Thanks for noticing. Thing is on some place of code we called
error_reporting(E_ALL ^ E_NOTICE)
which, with combination with php 5.4, will cause display Strict errors.
We fixed this in new version, also with real reason of these notices (calling instance methods statically).