20 ml of the white condenser clogging "Gunk" was isolated and added to 200 ml dH2O and kept overnight at 10 C. Next day the "gunk" had turned into brownish globules of oily material, which floated in and near top of H2O (NOT sinking). Suctioned and filtered oily material to get approx. 15 ml of clear deep Red-Brown-Greenish oil. Oil has intense "Vicks VapoRub" odor, and apparently is source of odor in Ketone as mentioned. Small amount of charcoal particles added to oil caused spontaneous formation of small flat angular "waxy" crystals. In addition, when test tube of oil was shaken, small amount of material on sides formed waxy deposit very similar to original material clogging condenser. Oil is soluable in DCM, acetone, etc.
So... it appears that this material is indeed some sort of Ketone and/or Ketene by-product from the Wacker reaction.
Wish I had GC and IR at my disposal to see what this stuff really is.