When importing lists, if an email address contains spaces after the address, it will be included in the import, causing the email to be invalid. Would like to see Marketo automatically remove these spaces during the list import. I realize there are ways to manually do this but this would just make it so much easier and lessen the risk for invalid email addresses.
When I used to develop web applications in my prior career, there was a very useful function that we used when importing contact information (including form submits) into SQL Server. We simply applied a TRIM function to the email address that striped out any spaces before or after the address. For example "TRIM(email address)". I'm sure every application platform has this feature (ASP, PHP, etc.).