There is a quite a big commotion regarding the G2 having cracks, hairline or otherwise over at dpreview. I have yet to check for the cracks as I'm still at work. Many have complained that the G2 plastic cover cannot withstand the weight of the whole camera.
For photo details, refer to the following thread:
http://www.dpreview.com/forums/read.asp?forum=1010&message=2418070
For the complaints, refer to the following:
http://www.dpreview.com/forums/read.asp?forum=1010&message=2411646
http://www.dpreview.com/forums/read.asp?forum=1010&message=2254143
For photo details, refer to the following thread:
http://www.dpreview.com/forums/read.asp?forum=1010&message=2418070
For the complaints, refer to the following:
http://www.dpreview.com/forums/read.asp?forum=1010&message=2411646
http://www.dpreview.com/forums/read.asp?forum=1010&message=2254143