Share your exploratory scenarios

Hi,

I need people to share their exploratory scenarios. This way, we can learn and attack more on applications.

I learnt some scenarios, and I am willing to share with you.

1. User Action: Provide spaces at the start of a string in text field and save.
    System Response: The spaces should be trimmed
2. User Action: Provide spaces at the end of a string in text field
and save.
    System Response: The spaces should be trimmed
3. User Action: Provide spaces in the middle of a string in text field
and save.
    System Response: The spaces should NOT be trimmed
4. User Action: Produce an error message on a page, e.g. you did not provide
email address
                       Now provide valid email address and save
    System Response: The information should be saved successfully

What I have noticed in the above scenarios is following

Scenario1: The space is not trimmed and duplicate data can be inserted
Scenario2: The space is not trimmed and duplicate data can be inserted
Scenario3: If the above two scenarios are fixed by developers, there is a chance they trim the spaces in middle of
string as well.
Scenario4: Producing an error message initially and then providing valid data gave me unexpected errors, e.g. null value
provided, hibernate error, etc.

I need people to share their scenarios, so that we can exploit applications and come up with more and
more bugs.

Regards