I should have mentioned earlier, I alreeady have the history feature disabled. I thought that was causing the attachment lag issue, but seems to make no difference either way.
Oh, it's very very strange. I don't know what may cause such problem in this case. I am going to check this.
Also, under pase otions I have tried the "restore clipboard contents after pasting a clip" option both checked and un-checked. I also have played with the compatibility delay. It's at 70 right now, and have tried it at 50 without much change.
This options affect only to the paste operation, nothing more.