The custom image is not created properly for Signature Pro ver 3.1 on iPhones with OS 4.0 or higher. We have resolved this and submitted an update to Apple. It should be available for download in about a week.
There is an issue with the latest update to Signature Lite version 3.1 as of 27 August 2010. The copy to clipboard feature does not work some iPhones in particular 4.0.
An update has been submitted to Apple to address this issue. We expect it to be release in about a week.
If you cannot see images in your iPhone email, check your Load Remote Images setting under Mail Contacts and Calenders after launching the iPhone Settings apps. This apparently can sometimes be turned off during syncing.
We are thrilled to receive a 5 star rating from Vous et Votre Mac Magazine, a leading Apple Mac magazine circulated in Europe.
For the full article, click the read more link below.
Both Email Signature and Email Signature Pro has updated hotlinks to support
Gmail, Skype, WordPress, Digg, Tumblr and Email.

Email Signature is the best signature application available for the Apple iPhone / iPod Touch. A must-have for all business professionals.
The latest Email Signature Pro contains the following advanced features:
We've had several requests asking if we could allow users to change the formatting for each line in each text field instead of the whole field. We've resisted doing that in the past because we thought it would complicate the user interface and making it difficult for users to configure their signatures.
If you're a savvy user, there is a way to do this although it definitely isn't a point-and-click solution.
Symptom, you create a signature and when you insert it into your email, you get a null character. Chances are in your signature you used a % sign. The percent sign is a special character to insert other special characters like space. e.g. %20 means space or %2A means *. So when you add a % sign on it's own, the Mail app doesn't know what to do with it and does something horrible like insert (null) in your email.
To add a percent sign in your signature you should put %25 which means add a percent sign.
Wikipedia has an excellent article on percent-encoding.
To use your email signature when replying to an email, do the the following:
1) Hit the reply button in Apple Mail
2) Exit Apple Mail by using the Menu button (the hardware button at the bottom of your iPhone)
3) Run the Email Signature app, and select your signature
4) Your selected signature will be inserted into the reply email
5) Compose and send the email as normal
Note: follow the same procedure to forward an email.
This process is required due to the limitations that Apple applies to ALL Third Party applications, Email Signature Pro included.