Comment 4 for bug 1275449

you can always printf debug by adding stuff into the vim or python scripts.

what happens when you press <ctrl-tab> (in gvim, this will not work on the console)? This should list all defined snippets.

what does :UltiSnipsEdit do?

If the mappings are set (and they are) everything should be working just fine. It could be that the filetype is not properly detected in case you have your vundle installed wrongly, but lorem<tab> should work in all cases (as it is defined in the all.snippets). I do not know all of the other plugins you have installed, so it could be that one of them is making trouble, but I doubt it.