Blackberry Desktop Manager problems
Blackberry Desktop Manager version 6.0 has just been released. It seems to be incompatible with some add-in programs, including CompanionLink (used for synchronisation with ACT!) and some backup software. If you can avoid taking the upgrade, you can continue using Desktop Manager version 5 until the add-ins you use have been updated to suit. If you have already upgraded to Desktop Manager version 6, then in order to keep using your add-ins yuou need to uninstall it and re-load version 5. You can download the previous version of Blackberry Desktop Manager here
Update 20 August 2010. CompanionLink have released version 4 of their product - see this link. This is said to be compatible with Blackberry Desktop Manager version 6.0.
Update 1 September 2010. CompanionLink have published instructions for the latest versions of their product with Blackberry Desktop Manager here.