Thank you Daniel and Helen for your replies.

Helen: I will be looking at your demo later, but my real concern is why was the
ability to edit a blob working in previous projects and not now?

BTW, most BLOBs in this project have strings in the range of hundreds to a few
thousand bytes, but some could get up to many thousands.

It's a kind of medical information database project.

Daniel: This is a local based project.
Version of IBO: 4.2.Ie
Transaction settings:
AutoCommit = true
Isolation = committed

Everything else is default.

Daniel, if yours is working fine, then what the heck am I doing wrong? I'm not
totally sure, but I seem to remember early in the project that it did work fine
when I was just throwing on components and quick setting up grids, etc. Maybe
not? Anyway, I was just trying to make all the various dbGrid + dbExpand +
DataInspector + embedded controls (TreeCombo, FontCombo, ColorCombo) work
properly recently and was having troubles, blindly trying different property
settings. I'm wondering if I did something, but the fact is, I can reproduce
this problem in a simple project.

Chuck