I got my dictionary working again by rebuilding packages.xml:
But it only works for rooted devices and it has some tricky prerequisites like working ADB and fix_permissions script...
Be sure to check out the Wiki for Sony PRS-T1 Rooting and Tweaks!
Many questions are answered there already... If not - feel free to add
Some modifications will void warranty and may irreversibly destroy the device. I won't take responsibility if you damage your reader by using one of my files or following my suggestions.