BASH "command typing" problem

[arnuld]

I am running Arch GNU/Linux. sometimes i have problem with BASH on
it. whenever i type something a little long it does not go to the end of
the terminal, instead the cursor just slips-off to the beginning of
the line e.g.:

[arnuld@arch ~ $] cp -v songs/rock/Alice_Cooper/*
songs/Classic_Rock/Alice_Cooper 

if i type that line then in 90% of the cases, the line does  not go to the
end of the terminal, rather when i reach in the middle of the terminal the
cursor there slips off to the very-beginning of the terminal -
[arnuld@arch ~$]" - and starts to overwrite things there. when i hit
"Enter" then command runs fine but i can't see what command i typed in
because the typing starts from the beginning automatically. e.g. it looks
like this:

_Cooper@arch ~ $] cp -v songs/rock/Alice_Cooper/* songs/Classic_Rock/Alice 

compare it with the original command i gave:

[arnuld@arch ~ $] cp -v songs/rock/Alice_Cooper/*
songs/Classic_Rock/Alice_Cooper 

it is because cursor just slipped-off to the beginning and it overwrote
the "[arnuld".


this does not happen when my login shell is ZSH (which is what i am using
at present). what could be the problem... a BASH bug ?

{arnuld@arch ~ }% bash --version
GNU bash, version 3.2.17(1)-release (i686-pc-linux-gnu)
Copyright (C) 2005 Free Software Foundation, Inc.
{arnuld@arch ~ }% 


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