The status 'waiting to run, suspended, waiting for memory' was reported for task ts02_a111_pdb001_0 by Boinctasks. This is the first pdb I have run.
The properties for the task showed:
Virtual memory size 2344Mb
Working set size 1278Mb

My startup messages are:
23-Jan-2011 13:43:54 [---] Starting BOINC client version 6.10.58 for windows_intelx86
23-Jan-2011 13:43:54 [---] log flags: file_xfer, sched_ops, task, sched_op_debug
23-Jan-2011 13:43:54 [---] Libraries: libcurl/7.19.7 OpenSSL/0.9.8l zlib/1.2.3
23-Jan-2011 13:43:54 [---] Running as a daemon
23-Jan-2011 13:43:54 [---] Data directory: C:\ProgramData\BOINC
23-Jan-2011 13:43:54 [---] Running under account boinc_master
23-Jan-2011 13:43:54 [---] Processor: 2 GenuineIntel Intel(R) Core(TM)2 CPU 6420 @ 2.13GHz [Family 6 Model 15 Stepping 6]
23-Jan-2011 13:43:54 [---] Processor: 4.00 MB cache
23-Jan-2011 13:43:54 [---] Processor features: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss htt tm pni ssse3 cx16 nx lm vmx tm2 pbe
23-Jan-2011 13:43:54 [---] OS: Microsoft Windows Vista: Home Premium x86 Edition, Service Pack 2, (06.00.6002.00)
23-Jan-2011 13:43:54 [---] Memory: 2.00 GB physical, 4.23 GB virtual
23-Jan-2011 13:43:54 [---] Disk: 347.30 GB total, 266.24 GB free
23-Jan-2011 13:43:54 [---] Local time is UTC +0 hours
23-Jan-2011 13:43:55 [---] No usable GPUs found
23-Jan-2011 13:43:55 [World Community Grid] URL http://www.worldcommunitygrid.org/; Computer ID 435222; resource share 100
23-Jan-2011 13:43:55 [World Community Grid] General prefs: from World Community Grid (last modified 01-Jan-1970 00:00:01)
23-Jan-2011 13:43:55 [World Community Grid] Host location: none
23-Jan-2011 13:43:55 [World Community Grid] General prefs: using your defaults
23-Jan-2011 13:43:55 [---] Reading preferences override file
23-Jan-2011 13:43:55 [---] Preferences:
23-Jan-2011 13:43:55 [---] max memory usage when active: 1022.91MB
23-Jan-2011 13:43:55 [---] max memory usage when idle: 1534.37MB
23-Jan-2011 13:43:55 [---] max disk usage: 10.00GB
23-Jan-2011 13:43:55 [---] don't use GPU while active
23-Jan-2011 13:43:55 [---] (to change preferences, visit the web site of an attached project, or select Preferences in the Manager)
23-Jan-2011 13:43:55 [---] Not using a proxy
23-Jan-2011 13:43:55 [---] Suspending computation - initial delay
23-Jan-2011 13:45:56 [World Community Grid] Restarting task ts02_a117_pca003_1 using dddt2 version 617
23-Jan-2011 13:48:22 [World Community Grid] task ts02_a111_pdb001_0 aborted by user

The current pdb is running OK with:
Virtual memory size 520Mb
Working set size 18Mb

Was this a rogue task?