Here's a link to several pix of a nasty situation in my (only)
bathroom.




I am scared to death that there is a leak somewhere in the wall which
is showing up at the base.

Background: Some years ago the latch on the shower went bad, and
water leaked out in this area. So I replaced the latch. Shower is
used by another person, so I just now checked to make sure it closed
tight, and it does, and OP is aware of this. I got in the shower,
turned on the water, but did not see any leakage through shower door.

Any idea what could be causing this, and what I need to do?

TIA

HB