I have at times. I just switched to a fire fox browser thinking it would help, but it has not been really effective. I have trouble on chat at times as well. I think it is just one program that is not playing well with another one. I have the Mcfee virus protection and I think it may be set really high and that is what the issue is, but I do not want to set it lower just in case. To me, there must be a reason it is blocking things at times. You may benefit from checking your security program and maybe lowering it, but I would not do it.
Sorry I could not be more help.