This is the save point after the chem lab...hope this helps..
home.comcast.net/~mmatthe8667/Examination_Room_2008-02-17_15.16.54_20.rar
you need to put it in the dir where your save files go for the game...
in vista its: C:\Users\yourloginname\Documents\Penumbra\Black Plague\save\auto
This is from a gamespot forum worked for me it will show up in your auto save section if done right
OH MY GOOOD, i looked so much for a solution about this, its been like 6 months now... and the game looked soooo good, i could'nt play. I tried the saved game and all goes well. THX ALOT dude seriously!