User-Agent: Mozilla/5.0 (Windows NT 6.1; rv:2.0b12pre) Gecko/20110214 Firefox/4.0b12pre Build Identifier: Mozilla/5.0 (Windows NT 6.1; rv:2.0b12pre) Gecko/20110214 Firefox/4.0b12pre Images and text within a flash video embedded in a website sometimes appeared in a black background. Reproducible: Always Steps to Reproduce: 1.Go to the url 2.There will be showing four videos in a flash player. 3.Wait until video No.4 ended. Actual Results: Text and images in Videos No. 1 & 4 would appeared in a black background. Expected Results: Legible text and images in a white background seen in IE 8. I have reported something similar to this bug before in earlier beta and still encounter it in Beta 11. Tried latest nightly build as I thought it has been fixed by now.

Thanks for the report but this is a known issue. Read the bug this is duped to for more details.