Yeah, it is a common bug. Here is the work- around:
1. Create a shortcut to vampire.exe
(Or just right click on the shortcut on your desktop/start menu)
2. In the menu select "Properties" (should be the entry at the bottom)
3. Now a new Menu will appear. Look for something called "Target". There you
should see a path to the vampire.exe file.
4.Write " -console " behind this path, but without the ""
Edit: There appear to be two possibilities to do this. Either:
C:\Vampire\vampire.exe -console or
You have to enter your own path instead of C:\Vampire of course.
Thanks to Quark for that info.
5.Now start Vampire using this shortcut
6.Load the safegame
7. Go near the boat,but not so far that the loading screen appears.
9.Press "^" (The key right of the 1 on the keyboard)
10.A console will open. Type:
SaveJohansen() (press enter)
changelevel2 la_hub_1 taxi_landmark (press enter)
( Or as Nosferatu: changelevel2 la_hub_1 sewer_map_landmark )
Take care to get the capital letters right. If you get an "not defined" error
you probably messed up with the spelling.