(see third capacitor from bottom) ... I hate that smell.
From wikipedia:
"Self-destruction and thermal runaway
Tantalum capacitors are under some conditions prone to self-destruction by
thermal runaway. The capacitor typically consists of a
sintered tantalum sponge acting as the
anode, a
manganese dioxide cathode, and a
dielectric layer of
tantalum pentoxide created on the tantalum sponge surface by
anodizing. The tantalum oxide layer may have weak spots that undergo
dielectric breakdown during a
voltage spike. The tantalum then comes to direct contact with manganese dioxide and the leakage current causes a local heating; a chemical reaction then produces
manganese(III) oxide and regenerates (
self-heals) the tantalum oxide layer.
However, if the energy dissipated at the failure point is high enough, a self-sustaining exothermic reaction may occur, similar to the
thermite reaction, with tantalum as fuel and manganese dioxide as oxidizer. This can destroy the capacitor and occasionally produces
smoke and possibly
flame.
[3] To prevent catastrophic thermal runaway failure, auxiliary protective devices (e.g. thermal fuses, circuit breakers) may be used to limit fault currents"
Oh the joy, guess ill have to replace them and retry .. with the windows fully opened... no lets make it OUTSIDE!