Reports just hang

[risterian]

Many reports hang when I try to run them.  Specifically: Asset 
Barchart, General Journal, Net Worth (either one), Income & 
Expense Chart, Welcome Sample Report.

I have done Check & Repair All which never reports anything nor 
gives any indication of changing anything, just makes the log 
file big.  

This data is almost all as imported via QIF from Money (some
manual cleanup afterwards).

I have to kill GnuCash.

The trace file has nothing in it other than what it always
has:
* 02:06:29  WARN <qof.engine> [guid_init()] only got 1591 bytes.
The identifiers might not be very random.

I am running GnuCash 2.4.11 under Windows XP SP2.