Failed Metadata download causes Calibre quite unexpectedly message

Hello all,

I am having a issue when Calibre fails to download metadata, I receive a error message stating "Calibre quite unexpectedly." I hit the ignore button and the application continues to operate normally. It is not huge problem, more of an annoyance, as Calibre is still open and functioning.

I am running Mac OSX 10.10.5 and using Calibre 2.5.2

This has happened on several lower versions of Calibre as well, which indicates that it might be a system problem on my part, but wanted to check and see what people's thoughts were. Thanks!