problem with login to admin page

[mus.aqeel]

Some browsers/computers can handle the redirect with a space before the header is sent... but some can not handle that.. maybe thats why the problem appears and disappears without any changes!

i do not think so. because in my case everything same. laptop one, browser one.
sometimes work, sometimes not.

are you using the multi user plugin ?

if question for me
i do not use this plugin.
i am using following plugins:

faq
hitcount
i18n_base
i18n_common
i18n_navigation
i18n_search
theme_highlighter
dynpages