OHM symbol in blocks in DWG is not displayed correctly in V8i
Blocks in DWG are displayed as tags in MicroStation and the ohm symbol is not supported in tags in MicroStation V8i because tags are using Text Editor and not Word Processor.
This issue has been resolved in the Beta version of the upcoming release of MicroStation - MicroStation x64 Beta 1 (English) 08.21.02.115, block displays there correctly. Our Select users have the possibility to download it and test it on their side however this release is not for production yet.