REAL Software today released REALbasic 4.5.2, a maintenance update to its cross-platform development environment for Mac OS 8/9 and Mac OS X. Version 4.5.2 includes several bug fixes, all of which can be found here. REALbasic sells for US$349.95 in a Professional Edition or $149.95 in a Standard version; volume, academic, and upgrade discounts are also available.