[MACTCL] Pack forget problem

[<Ge...@Or...>]

I have an app I'm developing for a client under MacOS 9.1.*.
I mean I'm developing it under Unix for target environment MacOS. 

There's a "pack forget <widget>" problem, whereas the
named widget hierarchy is not fully unmapped. And when
focus (click) is brought to the desktop, the rest of the
supposedly forgotten widget is crudely displayed over
the newly packed one. 

The two widget hierarchies, .f and .s (both of which are
frames holding other widgets) will pack and forget fine
under Solaris, fail under MacOS. The test meant starting
wish, sourcing the main file, clicking on a button to
get to the second screen (pack forget .f worked once before
packing the second screen .s, but switching back by forgetting
.s and packing .f again yields the bizarre behavior). 

With the second screen sitting there, I manually issue a
forget for .s and a pack for .f. No problem doing this
under Unix, back and forth even between the two (repeatedly
forgetting one and packing the other). But disaster under MacOS. 

I point this out to say it seems like a true bug of some
sort and not a problem with the application. 

I tried a simple test with two labels .f, .s under MacOS.
They pack and forget fine. 

So it's something more involved. 

I couldn't find any listed bugs that would involve this.
It's the latest (8.3.4?) ActiveState release. 

Before I ask for a volunteer to check out my source,
any ideas or suggestions?