Perforce plugin will not sync paths with space in their names.
//aaa/bbb/... "//hudson_JOB_NAME/aaa/bbb ccc/..."
This will give an error in the config UI but even if you save it it will fail to sync.
I checked and in the final workspace(clientspec) this line will be missing and as a side effect the workspace will miss some files.
This is a major issue considering that there is no workaround for it, making the plugin useless if you are unlucky to have to use spaces in directory names.