02/21/85b ksh wedges terminal on `.' command errors--who has a fix?

[cado at elsie.UUCP]

Our newly-installed 02/21/85b version of ksh exhibits anti-social behavior
if an error occurs in a `.' command.  For example, if while running ksh I
type in the commands

	/bin/echo "/bin/cat < garbage" > subscript
	. subscript
	/bin/echo one
	/bin/echo two

I get the output
	
	ksh: garbage: cannot open
	one

and then my terminal locks up.

Does this bug appear in later versions of ksh?
Is a fix for the bug known?
If you know, please let me know by mail (rather than by posting a news article.)
Thanks.
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