or other, they did the block to frame transition improperly, and water
is
bypassing the moisture barrier and flashing, and building up in the
space in
the block, then draining out into your room.

Thanks for the info. Is that transition between block and wall most
likely an "expansion joint" or a "weep screed"? I know you can't see my
house g, but I was wondering if one or the other is unlikely or more
likely.

If it is an expansion joint, can it be caulked somehow if that's where
the water is infiltrating?

Thanks again,
-- Vinnie