Shoutbox

Hey, in my windows live messenger
I've noticed that since I installed messenger plus
I get a colon ( : ) after each typed sentence that only follows the sentence last typed. Example

Sally says:
Hey what's up??

Bill says:
Nothing much:  <---

Now i wouldn't mind this much if it stayed at that but as the conversation progresses i get more and more colons. example:

Sally says:
I have the coolest cat

Bill says:
My dog is way cooler:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::

Is there a way i can keep messenger plus and not have this issue??

I'm working on windows vista 64x if that means anything

Thanks for any help you can offer