I have it on my iPhone, have been using it for about a year and up til know never heard anything weird about it til now.
I had been texting with a Provider on Monday throughout the day and nothing odd, but on Tuesday, we were texting and I decided to log on to my gmail account and text through there also. When we met in the evening she let me know that during the day she was getting texts from me but from about 5 different phone numbers...
Not sure what happened but I guess from now on I'm only texting from GV on my phone and not from the online version.
Just wanted to put it out there for others to know.