I've been having some issues with IM+ on my pearl. I don't receive all my messages and some of the messages that I send don't always get to the person I'm sending them to. Is this a problem with the software or with my settings?

Are you on BIS or BES? If you are on BIS there are more issues generally. Check out their FAQ's and make sure you have your settings correct.

Potentially a multifaceted problem... I found the same problem if the person who is either IMing me, or I'm IMing with is not 'visible'... those kinda messages go to the ether somewhere to die...

-S