Question HTC Sense and Facebook contacts

Hello everyone!

I know there are a few similar threads in the forum already, but none of them solves my problem, which is the issue of Facebook for HTC Sense not synchronizing the pictures of my contacts.

I have read on the internet that it has to do with Facebook set on "https mode" and that changing this flag should fix the issue when re-synchronizing contacts, but it just doesn't for me.

I have my contacts with the picture they had months ago and sometimes this is annoying. I guess this pictures have to be stored somewhere in the phone's memory and, thus, it should be possible to delete them manually. But the question is, where are them?

If this is not a feasible solution, does anybody have a good one?

Thank you!