Header is displaying   instead of space, plz let me know how to get rid of this.
I want to override the style of "Export to Excel" button, i override these in additional css file, but still styles from Report.css will overriding my styles, and this is final rule as well. How to override this style. please let me know ASAP.
Note: current version Pega 7.1.8 version, upgrading from pega 5.4v
Summary view header is displayed with description value of Summary view history tab. Please check the history tab of summary view for the word  . If it is there then remove.
For Export to Excel button styles, You said you have overridden the style attributes in additional css file. So, please keep the word "!important" at the end of every css attribute. For Example, if you want to override the height then your attribute must be "height:200px !important". Do this for all your css attributes. The your styles will reflect at runtime by overriding OOTB report.css styles.