I can reliably reproduce this crash, both with pgAdmin 1.14 and pgAdmin 1.16.1.
I'm running the latest Windows version. To reproduce the crash I view the top 100 rows of data in a table (one or more records, it doesn't matter), copy something from a text field, wait for the database to change that text field, then click the Refresh icon, and 'No' to 'There is unsaved data in a row'. pgAdmin freezes then crashes reliably every single time in both versions. I've set up logging to debug but it doesn't provide any useful information beyond that.
