JSON Framework and user input validation

Question

Hi guys,

I use JSON framework in my iPhone application to send text user input to server. This data will be stored in DB and displayed on web afterwards.

I want to ask what I should be aware of safety-wise. I tried to add to my input different symbols (like ":" , "} and so on) to close/break my JSON but it seems that JSON Framework handles it adding escape symbols . I'm also aware of SQL injections and going to handle it.

Is there anything else?

Thanks