This is not a URL, you've paste binary content of images. Please don't use binary data content in forum posts. This should be used in HTML template files not in content texts.

Don't use URLs with this prefix: data:image/gif;base64,R0lGODlhEAAOALMAAOazToeHh

URLs should look like this: http ://example.com/path/imagename.jpg or so....

I reported the issue on this forum : 

http://www.dfwmas.org/community/need-assistance-with-the-forum/website-feature-long-urls-not-wrapping/

And the admin was able to resolve it.

Edit : happens with long single words as well.

kajsdhfkjhagskdjfhgasjkhdgfjkashtdvhajgefkhbasdhbvuaydsgfjkbadsfvklbaiurgfjkglkajsdhfkjhagskdjfhgasjkhdgfjkashtdvhajgefkhbasdhbvuaydsgfjkbadsfvklbaiurgfjkglkajsdhfkjhagskdjfhgasjkhdgfjkashtdvhajgefkhbasdhbvuaydsgfjkbadsfvklbaiurgfjkglkajsdhfkjhagskdjfhgasjkhdgfjkashtdvhajgefkhbasdhbvuaydsgfjkbadsfvklbaiurgfjkglkajsdhfkjhagskdjfhgasjkhdgfjkashtdvhajgefkhbasdhbvuaydsgfjkbadsfvklbaiurgfjkglkajsdhfkjhagskdjfhgasjkhdgfjkashtdvhajgefkhbasdhbvuaydsgfjkbadsfvklbaiurgfjkglkajsdhfkjhagskdjfhgasjkhdgfjkashtdvhajgefkhbasdhbvuaydsgfjkbadsfvklbaiurgfjkgl

Strange does not happen here...

http://imgur.com/a/T76HH