Problem attaching files with yahoo mail beta (Score 1)

I tried out the yahoo mail beta last week, and I promptly dumped it in favor of the regular yahoo mail. I tried to attach some files to the email while using firefox, but the popup window to select the attachments was so small that I couldn't click on the browse button to find the attachment, I had to use the tab key to get to it. And there wasn't an 'ok' or 'attach' button in sight anywhere. Screw that.