strange difference in UI for identical .vimrc

I have two machines with 8.2.2263 and 8.2.5052 respectively with the
following .vimrc (same NIS account/NFS home dir) and in the 2263
machine shows a transparent background (which is what I want) and the
5052 shows and opaque one which is not what I want (See screen shots).
How do I make 5052 behave like 2263.

.vimrc (note both machines get the syntax highlighting correct and
2263 is accessed via ssh using XFCE4's Terminal emulator from the
machine 5052 is on):
set term=xterm-256color
set t_Co=256
set t_u7=
set noautoindent
runtime colorscheme colors/slate.vim
syntax enable
:noh
:set noincsearch
:hi Constant ctermfg=220
:hi String ctermfg=220
:hi Identifier ctermfg=lightblue
:hi javaCommentTitle ctermfg=yellow
:hi javaDocComment ctermfg=178
:hi javaCommentTitle ctermfg=178
:hi javaAnnotation ctermfg=lightblue
:hi Comment ctermfg=178
:hi javaDocTags ctermfg=Yellow
:hi htmlTag ctermfg=220
:hi htmlEndTag ctermfg=220
:hi javaScriptBraces ctermfg=white
:hi javaScriptParens ctermfg=white
:hi javaScriptType ctermfg=white
:hi javaScriptFunction ctermfg=lightblue
:hi xmlTag ctermfg=lightblue
:hi xmlTagName ctermfg=lightblue
":set t_ti=^[[?1049h
":set t_te=
set mouse-=a


--
Aryeh M. Friedman, Lead Developer, http://www.PetiteCloud.org

--
--
You received this message from the "vim_use" maillist.
Do not top-post! Type your reply below the text you are replying to.
For more information, visit http://www.vim.org/maillist.php

---
You received this message because you are subscribed to the Google Groups "vim_use" group.
To unsubscribe from this group and stop receiving emails from it, send an email to vim_use+unsubscribe@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/vim_use/CAGBxaXmvUPuEuJ0_X8Th1U8xwsucdjnyHpA537KiKErSzwKrLQ%40mail.gmail.com.