iNotes.ntf in 6.5.4 - not able to delete and replace attachment

Hi,

I find that after upgrade to 6.5.4. my users (browser based iNotes users)are not able to delete an already attached attachemnt and replace it with an other. Procedure followed: -

1> Forward an already send mail.

2> Remove the existing attachment in it and replace it with another.

3> Send the mail

4> The recipient recieves both the attachments.

Please give ma a solution

Thanks