InfoPath Dev

Sure, this can be done with custom code. You could also use qRules for this, if you'd prefer not to write your own custom code. If you are writing code for it, I guess you'd just use a changed event on your field bound to your drop down for this - you may want to spend some time thinking about what your anticipated behavior would be if ...

So, some users can paste info copied from an email into a rich text box and some can't? Can they paste in other content, not copied from email? Or am I misunderstanding the issue? Generally, I check things like version of Office, service packs, operating system, version of Internet Explorer, IE settings to try to track down these issues.

You could add a rule to the field in InfoPath - the condition would be if the field doesn't contain "-" you could add it - using substring functions to get the numbers separated in groups. I'm not sure if you can do this in a calculated column in SharePoint - because you need to make sure the user hasn't already entered ...

You'd need a data connection in your form to List A. You could add a rule to the Reason field to populate the Risk Level based on the selected Reason.... Here's a how to video that might help you - I've not watched it yet, but found it searching online for a tutorial that might help you.

Hi - I'm having trouble understanding - are you saying the validation never works? Or it works if you open the form in InfoPath, but not in the browser? Or something else?

Do other Office items open as expected from SharePoint on that machine? Word, Excel, etc?

Sorry, I missed that point! What about IE settings? Can you compare the settings from a working machine with the one that is not working?

That is actually XML that's being displayed, not HTML. Could it be that somehow on her machine InfoPath isn't correctly associated for XML file types?

Not to my knowledge.