G string buzz

[Lane Pryce]

I have a fret buzzing on my G string pair. I like the action low and hate to raise the saddle. Are there any issues with taking a small file to the offending fret? Funny because it was not doing it the other day. Lp

[sunburst]

There might be some issues.
First of all, If it's only one high fret that just showed up, you might just need to drive it back down. If it won't stay, a little superglue will keep it there. Of coarse, you have to know what you're doing with the superglue.

You can check for a high fret with a straight edge short enough to span three frets only. If it rocks on a fret, that fret is high.
If it turns out to be well seated and you have to file a fret, it must be left level with the others, and it should be re-crowned afterwards. It really should be "milled" level with the rest of the frets, but a carefully filed individual fret can cure a fret buzz.

[Flowerpot]

You may want to check the humidity too. The fingerboard drying out can make frets pop up on the ends. Tis the season for drying out instruments.

[acousticphd]

Which fret? The most likely is probably the 1st fret, since its clearance is the smallest. It's possible that one of the G string nut slots gradually wore low enough to allow the buzz (same thing has happened to me).