Bash – Screen cuts off beginning of long command when accessed through bash history

I'm using the default versions of bash and screen in OS X Lion.

When I'm in a screen session and I scroll back through the bash history and I come to a command that is long enough to wrap.

I might first type some command:

selassid@tem02:~$ ls ljmix/fiftyfifty_softsphere/T0.350/r2.43/0.565421311859c0.1
83279836214c0.144847759343/

That wraps properly as written above, but if I press up to access it via bash's history, the console displays only:

83279836214c0.144847759343/

So the prompt and the entire first line of the command is missing, which makes it difficult to edit; if I scroll back to the first line, it appears but it overwrites the last line of output.
When I execute the command, the rest of the first line is displayed and everything looks as expected:

selassid@tem02:~$ ls ljmix/fiftyfifty_softsphere/T0.350/r2.43/0.565421311859c0.1
83279836214c0.144847759343/
total 1792
...
selassid@tem02:~$ 

What's more curious, is that if use the history to access the long command but I don't execute it yet, then use any C-a screen command, like switching to another window and then back, or if I click out of my current terminal window and back into it, the history command is now displayed properly again.

My PS1='\u@\h:\w$ ' so there's nothing strange going on there.

Is there a way to correctly show the whole command when using the history? I've tried playing with the screen wrap settings, but they only make things worse.

stty -a shows:

speed 9600 baud; 46 rows; 80 columns;
lflags: icanon isig iexten echo echoe -echok echoke -echonl echoctl
    -echoprt -altwerase -noflsh -tostop -flusho pendin -nokerninfo
    -extproc
iflags: -istrip icrnl -inlcr -igncr ixon -ixoff ixany imaxbel iutf8
    -ignbrk brkint -inpck -ignpar -parmrk
oflags: opost onlcr -oxtabs -onocr -onlret
cflags: cread cs8 -parenb -parodd hupcl -clocal -cstopb -crtscts -dsrflow
    -dtrflow -mdmbuf
cchars: discard = ^O; dsusp = ^Y; eof = ^D; eol = <undef>;
    eol2 = <undef>; erase = ^?; intr = ^C; kill = ^U; lnext = ^V;
    min = 1; quit = ^\; reprint = ^R; start = ^Q; status = ^T;
    stop = ^S; susp = ^Z; time = 0; werase = ^W;