, 20 March 2008 (UTC)
I fought and I fought and went down several wrong dead-ends.  I've now managed to upload a versoin of Image:Indicator_diagram_steam_admission2.svg that renders about correctly, and which is still fully editable.
I think the biggest problem might have been that the text was placed in flowed-text frame which weren't big enough for the text they were containing (*shrug*), so it wasn't getting rendered when uploaded.  I did "Text→Convert to Text".
I hit an issue of the arrow-heads not being rendered;  so I duplicated the arrowed-lines, converted to outline and solid filled a copy of the arrowhead black on top.
The vertical "PressurePSI" wasn't rendering vertically;  I gave up and turned it out.
The text-on-a-path, whilst editable was not rendering.  I gave up and also used straight plain text.
A little black box turned up that wouldn't go away;  eventually I copied and pasted the whole lot into a new document that that little box disappeared;  you can probably see this going through the revision history.
I guess the situation is that the Wikipedia renderer is deficient as it stands, but that's fixable;  where-as having maintainable/editable images is a greater benefit in the long-term...  Stressful certainly, and I wasted quite a bit of time—something (other than the arrowhead non-rendering), I haven't encountered before.  —  17:16