Wimp_TextOp weirdness?

In Manga, for the What’s new? / Suggestions listings, I am using Wimp_TextOp 2 to draw the text in the current desktop font (so it fits in with the current look and feel).

The basic plan is:

• Read the palette
• For each line to draw:
  • Plot a rectangle to blot out previous contents
  • Work out text X, Y position
  • Set font colour
  • Plot the title
  • Update X position
  • Plot the additional information

This works fine when using an outline font.

It fails when reverting the system to use the VDU font (yes, I test for people who like to rock the eighties aesthetic!), the additional information is never plotted.

This cures it:

• Read the palette
• For each line to draw:
  • Plot a rectangle to blot out previous contents
  • Work out text X, Y position
  • Set font colour
  • Plot the title
  • Update X position
  • Do a move to X/Y origin
  • Plot the additional information

Actually, the move doesn’t have to be the X_origin, Y_origin, it just has to be “away”. Like anywhere that isn’t near that which is specified by the position passed to Wimp_TextOp 2.

Why? What’s going weird here?