Also need more than 31 characters...We have development "collector assemblies" along with feature names using acronyms that only the experts in the area understand.
File names have always been limited to a max. of 31 characters in length and no spaces. Capitol letters were allowed sometime around Pro/E version 20??
Allowing spaces and or allowing more characters would be a welcome and LONG, LONG overdue program fix.
As you can see in Brian's comment for that idea, there are plans to allow spaces and special characters in filenames in Creo 4.0. Don't know if that includes cyrillic as well, though.