We are using Adobe CS4 with latest patches and it has been observed that Flash either becomes extremely slow or it just quits unexpectedly in the following instances:
1. When working on graphically intensive tasks like frame-by-frame animation wherein hundreds of key frames involving huge number of symbols are used. Typically, if a symbol is duplicated into hundreds of instances.
2. When working on an extremely detailed illustration/sketch, where lots of nodal points are formed from the curves by using pencil tool.
Besides these particular instances, there are times when it gives trouble even in normal usage.
Hardware configuration: DELL PRECISION T 3400, RAM -4GB, HDD- 160 GB, Virtual RAM 4GB.