Stuck in Requiem Level 6

[dungbeetle]

I seem not to be able to upload any file. In the attachment box it says: You are currently using N/A of your allocated attachment usage (14.65 MB) and after Add Attachment I get:
The file upload failed. Please choose a valid file and try again. Error details: The attachment could not be found on the server.

Am I doing anything wrong?

And by the way, just like the first poster about this problem, mine has also disappeared without any obvious reason. I just went for lunch, left the computer on and when I came back, the game after loading ran smoothly. Anyway, I loaded level 5, finished it, died in level 6 and after loading the same problem as before appeared.

Please upload a saved game from this level that has this 2fps behaviour. Saved games are in ~/Library/Preferences/Frictional Games/Penumbra and also take the hpl.log file and upload it too.