Last night I brewed my smallest beer to date (OG:1.039, mild). I have never had so many problems. My usual grain bills are around 10-14 lb for 5 gallons, and I have always had smooth mash and sparge. However, last night's attempt at a mild was seemingly not meant to be. Here's the run down:
1: used Beersmith the determine strike temp/volume. Did this the same way I always do, using the equipment adjust feature. I have always been +/- 1 F. Not last night. Was shooting for 154 F, landed at 148. Frantically, I started heating more water (not prepared). Didn't get to 154 until ~ 30 min in. So much for a full nice full malt character!
2: Stuck sparge! For the first time in 25+ batches, I was stuck. Strange that this happened on my smallest grain bill

Had to blow into manifold and re-vorlauf. There was obvious channeling afterward.
3: 30 minutes into boil, ran out of propane.
4: Chilled wort, went to draw hydrometer sample and... Ball valve frozen solid! Last night was below 0 F.
5: Brought full keggle into the house and thawed ball valve with warm water. Began filling carboy and the wort stopped flowing. The hop bag with used for bittering hops had found its way under the siphon tube and plugged it. Luckily the siphon tube is only loosely connected to the plumbing and I was able to shake it loose without opening the keggle and exposing chilled wort.
After all this, I still managed to slightly over shoot target gravity (OG: 1.040).
Should be interesting to taste, though I'm expecting a thin and bland mild due to low mash temps.
Lesson learned: Don't take small beers lightly!!