Ok, so I had a new thumbdrive that I had been planning to install debian on anyway
so I used that as my test guinea pig. My rigs an amd64, here is how it went.
1. Installed debian lxde 64 - wheezy (what I had for an iso handy)
2. ran apt-get update / upgrade / dist-upgrade (always my first step after a fresh install)
3. followed the debian instruction
here to upgrade to *Jessie
4. now that jessie was in place, ran apt-get update / upgrade / dist-upgrade again
- realized I mixed up berserk's and andrewferguson's posts, andrew was actually running lxde, berserk is running mate (doh)!
- installed debian Mate desktop, purged lxde desktop and dependencies (doh!)
5. downloaded Lc 8.1.6 64 (latest stable version as of this posting)
6. immediately hit that backdrop bug (p u)
- alt-tabbed to Lc, view menu, unchecked backdrop
7. ran the interactive tutorial
- I found the list on the left to be interesting, however the tutorial found it less amusing when I used it to set the mouseUp event.
8. having finished the tutorial with no other issues, I chose file/new stack/default size
- added a label, field, and 2 buttons
- set names for a little fancier 'hello' program
- no issues seen
*in addition to the default repositories, I enabled contrib and non-free in the sources list
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In this case, I installed only for myself, however I don't know that it would have made any difference going for all users.
For the issues described by berserk, I can only think of a few problems aside from what Max pointed out, but would need testing from the command line to determine it for sure. Sometimes programs that are partially running as he describes the problem can be determined starting it from the cli, by seeing what it reports failing.
Otherwise, try Max's launcher, as that will almost certainly pick off things you might be missing. As far as a pure fresh Debian installation, though, I see no issue.