Got DP to look at your post again - he said it definitely won't go "bang" and also muttered something about "wouldn't worry about it its only a bit of oil" (you'd probably have to appreciate the amount of oil round here from the 5 vehicles he owns to appreciate that he really means that)
Seems from your last post that its not leaking anymore so all should be well and you and it are not going to go bang.
One thing that struck me from your post though - if it was brand new in May is it not still under some sort of Warranty? Ideal time of year to send it back if it is!
And further to all of this, when you clean the blade, do you get all the clumps of grass out from their hidey places? They are renowned for rotting if you don't. Get them all out and dry it all off, and then spray liberally with WD40. I do that about once a month in mowing season.
Hope this helps. Keep posting if you're not sure about something and I'll keep bothering him - about time he earned his keep!!!