The most troublesome bug is the occasional ones,there is no definite way to reproduce it.
I've searched a lot on this topic,
the most probable reason is the charset,
and I've take some actions by setting the default charset
as utf8
in .htaccess
(I'm using apache),
but it still happens,again occasionally
Have you guys any tips other than setting the default charset to fix it?
As a side note that according to my own experience it happens mostly in IE,if not all