[IriDium]

As you may, or not, know but there is a *new* Raspberry Pi. HERE

Nothing major has changed (AFAIK) but it now supports 4 USB ports.

This obviously has additional power requirements. However, looking at the details, each port can now supply 300ma rather than 100ma.

Even though the RPi+ has lower power requirements ~600ma rather than 750ma, this of course requires an upgraded PSU - Now 2amp.

So when looking at issues - check if it is a Model B+ and it's PSU, as anyone who "upgrades" to the new model may not have the right PSU for the job.