Preferred Applicatations?

[petesoderman]

I'm a new user of LL, coming from the Windows world. Although I've played with various flavors of Mint in the last few years, I'm trying to move to LL permanently. I'm having a problem on three different machines that's driving me nuts. No matter how many times I set Chromium (or Chrome) as "preferred," when I open the application, it tells me it's not the default. When I click on a hyperlink in an email, I get a box asking me to choose an application (and Chromium is never a "choice." Have seen this problem in Mint occasionally, is this a Linux thing, or is there a permanent fix? Thank you.