hashing errors in 0.761

I have recently updated to this version, and it solved my problem with the port settings. But now I get errors in hashing -- cyclic redundancheck (something like that in a bad danish translation). And two folders are not added, even after I renamed them.

I used to have two accounts -- I have two computers connected through a Sagem router. But I discovered that I can add the folder in the 'other' computer through the internal network, so now I use one account. the two 'impossible' folders are on the 'other' computer. I have added other folders from the same computer (and harddisk) without any problems.

It's not the sharing settings of the folders...