It is not a Gnome bug. It's a Plymouth bug, but it's true that this bug is not specific to Linux Mint.
It can happen in all flavours of Mint 9 and 10.
In Linux Mint 11 it's fixed, and LM 11 LXDE RC will be released soon.
Registered Linux User #528502
Feel free to correct me if I'm trying to write in Spanish, French or German.