I have a strange problem with the colours in Lr. In the program everything looks good, the colours are the ones that i want to achieve, but when i export the pictures as jpeg (srgb), the tumbnails of these pictures seem to be fine (same colours as in Lr). However, when i open the jpeg (eg in picture viewer or in photoshop) all of the colours are different than the ones in Lr or the tumbnails. On a different computer, the jpegs have the same problem.
Any idea how to resolve this problem? Can I change the colour management of Lr itself (not the external editors)?