Little Issue in Bounced Virtual Instrument

Working on a song for a couple of days when, last night while I was working w/ headphones, I suddenly noticed a tiny audible glitch, almost like a crackle. I managed to isolate the problem: one of the bounced 8 outputs of EZ Drummer, namely, the room channel.

Zooming all the way in on the waveform, I see that the left channel of the stereo track has a very slight irregularity at the beginning of a hit. No clipping, not a spike - it somehow looks like a little nod. We're talking just a few samples, at a fairly low amplitude, something easily fixed using the pencil tool in an audio editor.

All the other outputs are just fine. 

So I'm kind of curious, since it's the first time I ever notice anything like that. Any of you guys ever seen anything similar and/or have any idea what might have caused it?

Thanks Guitarhacker. :) Glad to know that it isn't just me or my machine.
I actually managed to get rid of it rather easily - these were just a couple of samples, and the pencil did a fantastic job removing any trace of it.

I just hope it's not a sign of something going wrong on the hardware side. 

 

Same here.  Recently on 2 separate occasions I found an unexplained and seemingly random click in an exported audio file.