Did you mean you can print to a differnt printer WITHOUT problems? I suspect you did, and the issue is probably the printer. The don't say "emulation" anwhere that I coould find in a quick search, but they also don't say Genuine Adobe Postcript 3, or show the Adobe logo onthe literature, so I suspect it really is an emulation. ID doesn't seem to get along well with all emulation drivers (we see a lot of reports about HP printers and few about Ricohs) and the PDF workaround is really the best bet.
For waht it's worth, I think printing from a PDF is usally faster, anyway. It's also imperative if the file is going out for print that you do your inhouse prints with the same file you send out.
I can print to a different printer, but still a Ricoh, from a different computer using the same file and same version of InDesign with no issues using the Ricoh universal PS driver. I may try the universal PS again in just in case.
I did manage to find some small print that said genuine Adobe Postscript 3;
found near the end under Print Controller specifications.
I'll do some more testing from other PC's to the same printer as not everyone has reported similar issues, though I don't know if thats using InDesign specifically or other CS programs.
Your suggestion to print from a PDF isn't the first I've come across so if worse comes to worse that may be the way to go.
From what you are saying, it sounds like this is genuine postscript, and if others are not reporting problems, you probably shouldn't have them either. You might want to check what format the print data is being sent, and rather than just update the driver, I'd delete the printer and reinstall with the new driver.