QGIS 1.8.0 Mac OSX 10.6.8 These problems seem to be specific to Mac, as two Windows users don't have the problem.
Import a file as a vector:
1;"POLYGON((10 10,20 20,20 30,20 10))"
The features import with correct values, individual points can be edited, and the layer saved as a shape file. But, no feature can be selected that was imported this way, so they can't be moved. New features added manually to the same layer can be selected and moved normally.
Probably related, only wkt-created features fully contained within the view are shown, wkt-features that have even a small bit outside the view vanish entirely. However, features added manually to the layer behave normally by showing the portion in the view. Layer editing capabilities are normal (full).
Has anyone suggestions as to a workaround for this? I'm hoping to migrate a dozen maps with 10,000 or so features from an old package that only exports true CSV:
I can script-edit this format to the above WKT, or similar text format. I don't have an app for .dbf so haven't been able to look there for any difference between WKT imports and QGIS-created features.