"q" with psql display paging dumps out of psql

Hi,

Environment:

SunOS 5.7 Generic_106541-29 sun4u sparc SUNW,UltraSPARC-IIi-Engine
Postgresql-7.4.6
Build config: --with-java --enable-thread-safety
gcc version 3.3.1
less-381
readline-4.3

$ echo $PAGER
/usr/local/bin/less
$ echo $LESS
-e

I recently upgraded from 7.4.2 to 7.4.6 and have run into a new
problem. As frequently as not, maybe even most times, when I "q" out
of paging the output of a query in psql: Instead of just quitting that
query, I get dumped straight out of psql. To add insult to injury: The
command history for the current session isn't saved. (Only what was in
the command history on entry.) It's really quite irritating :/.

It's not repeatable. If I try to trace the psql session with truss, it
doesn't do it. If I "G" to the end of the output and then "q", it
doesn't do it.

I down-graded to Postgresql-7.4.5. It happened with it. I upgraded
"less" from v332 to v381. No improvement.

"echo $?" after it happens yields "141." There is no "141" in
/usr/include/sys/errno.h.

I'm guessing it's some kind of race condition. Any suggestions where I
might start debugging this problem?

Jim