I have a pagetype that contains some CultureSpecific property's.
The same pagetype also contains the following property:

[Required]
[CultureSpecific(false)]
[Editable(true)]
[Display(
 Name = "Image (Minimum of 160 x 160)",
 Description = "Image of the news item (Minimum of 160 x   160. Width and height must be equal). This image will be shown on ove    rview pages and the homepage",
 GroupName = PropertyGroupNames.General,
 Order = 20)]
[UIHint(UIHint.Image)]
public virtual Url ImageUrl { get; set; }

Note that the property is Required and non-CultureSpecific.

Now i do the following steps:

1. Create a new page for this pagetype in the default language, publish.
2. Switch to a different (non-default) language
3. Translate the page (by clicking on the translate button)

When in forms view, i can see the property is grayed out. It also tells me the property is 'shared between all languages and can only be edited in the master language'.
However the image component does not seem to have a value, because i only see a gray readonly textbox.

So i translate the CultureSpecific fields and press Publish, i get the following message:
The Image (Minimum of 160 x 160) field is required.

This offcourse should never happen, since it's clearly indicated that the property can only be edited in the master language.