While your bugreports are very welcome and helpful as well in both small and large issues, I would also like to remind you that a bug report is not similar to a product order.
I did a petition, not an order. :-/
By other side, with this error this plugin is quite difficult to use to send updates to twitter or identi.ca, for obvious reasons.
but the theme changes the size of the text entry, or the internal room inside it. With more space, kupfer tries to draw a bigger icon for the character count. That's what I think happens.
There is a second effect which I think is maybe the fundamental cause of this bugreport from the beginning.. if Kupfer makes an icon that is 1 single pixel too big, then the text entry rescales it smaller before showing it. But we can only guess how big the icon should be..
Yes, the gnome theme changes the fonts. By this I asked #8.
In this case, it's impossible to correct this bug.
I think the font of counter should be fixed, independent of gnome theme.
haha, yep that's too small. We'll need to compensate for different font sizes. Will be fixed after next release.