First question to ask is which system you are on? I am using Windows and I can not remember any problem item in you list that relates to the current update version of C5. I find the speed of C5 much, much better thn C4 also. Did you look at the pdfs of the updates? Are they listed as having been corrected? If so, reinstalling the updates may clear up your problems. Hope this of some help.

bwtr