Problem with beta 1.6.1.33

[Greyfox]

With a folder containing several hundred files added into c:\Documents and Settings\Username\Local Settings\Temp and using the normal SpybotSD.exe1.6.0.30, it asks each time on program startup whether to clean the temporary files. Changing SpybotSD.exe to 1.6.1.33 which adds the "Offer to clean temporary files folder" into settings results in Spybot NOToffering to clean the folder at startup, regardless of whether the tick is there, or not there. If I return to the old version it asks again. It is also not altering the DisableTempFolderCleaning in the registry tweaks section, which is set to 0 (don't disable)

This is repeatable - have also tried a reboot after changes of the exe file.
System is XP-Home SP3, all current Windows updates, Avast 4.8.1229 Home Edition antivirus, Zone Alarm 7.0.483.000 firewall. Only browser is IE7.