Please describe the problem:
When working with a drawing including text objects, zooming in causes the
drawing of the text to fail with the font size varying erratically. It also
destroys the printing and exporting of the diagram.

The following error message is displayed in the console (sometimes, not always):
(dia:4656): WARNING **: Failed to appropriately tweak zoomed font for zoom
factor 28.199999.


Steps to reproduce:
1. Open drawing and add some text and other objects 
2. Zoom in, say to 141%
3. Edit some of the text. Keep typing until the font size starts changing.
Make sure you add some new lines etc
4. You should have reproduced the bug.


Actual results:
The font size of some of the objects becomes really large and/or really small.
This failure persists until you zoom back to 100%.

Expected results:
Fonts start changing size

Does this happen every time?
yes

Other information:
I can supply files and screenshots if necessary