Any diagnosis on this spotting on the leaf? There are about 4 of these leaves on one plant, mid-plant.

Here's the link to the high resolution pic:
FileDen.com | Free file hosting and online storage

The grow details are below.

TIA for any ideas!

~jessie

Current Grow Details

GROW STATUS: 15 plants, flowered March 1st, 2010 (after 6 weeks of vegging)
STRAINS: AK-47, White Widow, Ice, Chrystal, LA Woman
MAIN ROOM: 2 x 1000HPS, 6'x8' SCROG on Hybrid Drip/DWC
NUTES: Lucas Method. Nutes usually around 1,000PPM.
CO2: Yes
TEMP: 70- to 90-degrees
HUMIDITY: Recently upped to 50%, from 30%
PH: Low 5's, checked regularly.
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TWO MAIN PROBLEMS:
--1) SATIVA LEAF CURL (aka, "the Claw). Some bud leaves are curling under on two plants. Changes to the obvious causes hasn't helped.
--2)SPOTS ON A FEW LEAVES: Yet To Be Diagnosed. Topic of this post. :-)
JessieDiamond Reviewed by JessieDiamond on . Leaf Spotting: Your Diagnosis? Any diagnosis on this spotting on the leaf? There are about 4 of these leaves on one plant, mid-plant. Here's the link to the high resolution pic: FileDen.com | Free file hosting and online storage The grow details are below. TIA for any ideas! ~jessie Rating: 5