I've upgraded to C1 ver 4.1.5058.34326. Since this upgrade, resizing image doesn't work - jpeg images are in full size. I've tried both mw parameter (depreciated in doc, but console uses it as max width) and w&fit parameters. But no difference. Image is inserted in a standard way with console insert dialog.
In source:
/media(da435003-5ea6-4f9d-a87f-c3e915c002b5)?mw=80
...renders as /media/da435003-5ea6-4f9d-a87f-c3e915c002b5/522483685/plakaty/20140116avoid.jpg?mw=80
Full URL is here: http://new.skrytypuvabbyrokracie.cz/media/da435003-5ea6-4f9d-a87f-c3e915c002b5/522483685/plakaty/20140116avoid.jpg?mw=80
EDIT: But some jpegs works, for example http://new.skrytypuvabbyrokracie.cz/media/e8c2dd55-c0b3-49a1-ad91-ef96fe51491f/486720786/cd-images/ourednikovyreferaty_cd.jpg?mw=60
Are the jpegs different?