Hi Lynne.
Thanks for the suggestion, but my posts still have the same spacing problem and although I'm still waiting for one of my mods to send my pm back to me, I suspect he's going to tell me it's still full of code.
I have allowed HTML for all groups in pm's, siggies and posts.
I'm using the following plug-ins:
1. Cyb - Advanced Forum Rules
2. Cyb - Advanced Forum Statistics
3. Cyb - Advanced Permissions Based on Post Count
4. Cyb - PayPal Donate
5. Members who have Visited
6. Prevent Doubleposts
7. Separate Sticky and Normal Threads
8. TCattd - The Image Resizer
9. vBadvanced CMPS (which is currently disabled)
10. Stop the Registration Bots (currently disabled while I do a fix provided by the coder)
11. vbStopForumSpam
12. vBulletin Blog (currently disabled as I haven't has time to design it yet)
13. Welcome Headers
Not sure if that's any help.