What happens is that Staff will have your support ticket in their queue and when thy get to it they will want to click into your blog and see it. They will want to use the same operating system and the same browser and version it you are using and attempt to reproduce the problem.
When contacting Staff in order to avoid a time delay in finding a solution and applying it what's important important is to include full details in your support ticket. Staff need to know what operating system you are using, which browser and version of it you are using, if you tried another browser or not and what the results were, whether or not your Flash is up to date, and how you are connecting to the internet and to wordpress.com.
Supplying all these details up front in your support ticket means Staff won’t have to employ back and forth email exchange with you in order to obtain relevant details and that means they can identify the source of the problem and provide a solution quickly. Not supplying them means there will be a longer wait and emails flying back and forth before the issue can be resolved.