Since I use the v6 stable, I do not encounter this bug almost over, but it happens sometimes, without any specific reason. We are not using a proxy anymore, but apache mod_rewrite because of this bug in the past, and it never happened with SSL because I didn't use it when I did the bug report.
I know I don't help you, but at least, this bug seems to dissapear slowly :D
Since I use the v6 stable, I do not encounter this bug almost over, but it happens sometimes, without any specific reason. We are not using a proxy anymore, but apache mod_rewrite because of this bug in the past, and it never happened with SSL because I didn't use it when I did the bug report.
I know I don't help you, but at least, this bug seems to dissapear slowly :D