Every year, I have to declare my income to the tax services. In the preceding years, I managed it with mostly no problems. This year, my computer being in the amd64 architecture, I feared I would have some troubles and I was right: one hour later, I could not yet do my declaration, and I used only about three minutes under MacOS X.

I started with a small advance: I already had a valid certificate till 2010, recognized at first try. I could then fill my tax form (the certificate is in PKCS 12 format, so I could later use it on the Mac to finish the declaration). The downfall was at the time of the signature: the java applet that was to be used to sign would not work.