htc desire z - Picasa (in gallery) not linked. Can't open picasa folders. How do I fix it?

I'm trying to open my picasa folders in the android gallery. When I press the Picasa button, I get this message:

your google account is not linked to Picasa Web Albums. Please add another Google account

I found this link from xda.
It starts with "can't find the app", and "can't sync" (problems I don't have) but then someone starts about the "not linked" problems. The tips I found where about removing accounts (for youtube, for htc sense, etc), but that didn't help.

I found a link to Why can't I Sync Picasa Web Albums? , but this is not the same question. The sync option is in the accounts menu, but I can't seem to get picasa in the gallery.

I can upload (via gallery -> share) to picasa. I can also make new directories etc. I just can't see my picasa in the gallery

specs:

• HTC Desire Z


• "standard" htc software: android 2.2.1 with HTC sense (1.82.405.1)


• HTC hub has "sync" enabled


• my Google account has the picasa-sync enabled

Does anyone have a clue about how to fix this?

Answer

Ok, not a real final answer, but this is what happened. I had another problem with the gallery, described here: Not all images showing up in gallery

In following all the advice there I have

• Removed data from "gallery" application in menu->settings->applications


• Removed the .thumbnails directory from /DCIM


• Removed data from gallery app again.


• Shut down the phone and removed the battery.

I don't know if that fixed the showing-up problem, but now all of a sudden I can actually see my picasa folders..