I have had that problem in VSD but not in a long time...usually it was a recent picture I added and removing it and "saving" then putting it back in and "saving" then uploading resolved the problem for me. But it could have been blind luck, too.
As for 1and1 I have found them to be very reliable. You can find "dirt" on any company out there. But as far as CC products and uploading, etc. I have had no problems and have multiple websites hosted with them.
I did have an issue just the other day not being able to log in to my own control panel...turns out that problem only existed for about 15 minutes (of course that's when I needed in...ha) but they credited me one month of hosting for the inconvenience...BTW...it was only the control panel that was not working...sites all loaded and were live as normal.
I hope you can find and resolve the issue.